diff --git a/src-ui/logics/common/index.js b/src-ui/logics/common/index.js
index c03d13eb..7cac177c 100644
--- a/src-ui/logics/common/index.js
+++ b/src-ui/logics/common/index.js
@@ -12,5 +12,6 @@ export { useUpdateSoftware } from "./useUpdateSoftware";
 export { useVolume } from "./useVolume";
 export { useHandleNetworkConnection } from "./useHandleNetworkConnection";
 export { useHandleOscQuery } from "./useHandleOscQuery";
+export { useIsOscAvailable } from "./useIsOscAvailable";
 export { useIsVrctAvailable } from "./useIsVrctAvailable";
 export { useFetch } from "./useFetch";
\ No newline at end of file
diff --git a/src-ui/logics/common/useHandleOscQuery.js b/src-ui/logics/common/useHandleOscQuery.js
index f952aaac..45b03b96 100644
--- a/src-ui/logics/common/useHandleOscQuery.js
+++ b/src-ui/logics/common/useHandleOscQuery.js
@@ -1,45 +1,36 @@
 import { useI18n } from "@useI18n";
-import { useNotificationStatus } from "@logics_common";
-import { useOthers } from "@logics_configs";
+import {
+    useNotificationStatus,
+    useIsOscAvailable,
+} from "@logics_common";
 
 export const useHandleOscQuery = () => {
     const { t } = useI18n();
     const { showNotification_Warning } = useNotificationStatus();
-    const { updateEnableVrcMicMuteSync } = useOthers();
+    const { updateIsOscAvailable } = useIsOscAvailable();
 
     const handleOscQuery = (payload) => {
         const is_osc_query_enabled = payload.data;
         const disabled_functions = payload.disabled_functions;
 
+        // OSC無効になるのは、OSC IP Addressが127.0.0.1、localhost以外の場合で発生。
         if (is_osc_query_enabled) {
-            updateEnableVrcMicMuteSync(prev => ({
-                ...prev.data,
-                is_available: true,
-            }));
-            return;
-        }
+            updateIsOscAvailable(true);
 
-        if (!disabled_functions.length) {
-            updateEnableVrcMicMuteSync(prev => ({
-                ...prev.data,
-                is_available: false,
-            }));
-            return;
-        }
+        } else { // OSC自体は無効だが、無効になった機能がない場合。
+            updateIsOscAvailable(false);
 
-        const items_label = disabled_functions
-            .filter(fn => fn === "vrc_mic_mute_sync")
-            .map(() => `- ${t("config_page.others.vrc_mic_mute_sync.label")}`)
-            .join("\n");
+            if (disabled_functions.length > 0) { // 無効になった機能がある場合は通知。
+                const items_label = disabled_functions
+                    .filter(fn => fn === "vrc_mic_mute_sync")
+                    .map(() => `- ${t("config_page.others.vrc_mic_mute_sync.label")}`)
+                    .join("\n");
 
-        updateEnableVrcMicMuteSync({
-            is_enabled: false,
-            is_available: false,
-        });
-
-        if (items_label) {
-            const message = `${t("common_warning.unable_to_use_osc_query")}\n${items_label}`;
-            showNotification_Warning(message, { hide_duration: 10000 });
+                if (items_label) {
+                    const message = `${t("common_warning.unable_to_use_osc_query")}\n${items_label}`;
+                    showNotification_Warning(message, { hide_duration: 10000 });
+                }
+            }
         }
     };
 
diff --git a/src-ui/logics/common/useIsOscAvailable.js b/src-ui/logics/common/useIsOscAvailable.js
new file mode 100644
index 00000000..ffbb96c9
--- /dev/null
+++ b/src-ui/logics/common/useIsOscAvailable.js
@@ -0,0 +1,10 @@
+import { useStore_IsOscAvailable } from "@store";
+
+export const useIsOscAvailable = () => {
+    const { currentIsOscAvailable, updateIsOscAvailable } = useStore_IsOscAvailable();
+
+    return {
+        currentIsOscAvailable,
+        updateIsOscAvailable,
+    };
+};
\ No newline at end of file
diff --git a/src-ui/logics/store.js b/src-ui/logics/store.js
index 74e8f6da..8f332a6e 100644
--- a/src-ui/logics/store.js
+++ b/src-ui/logics/store.js
@@ -146,6 +146,7 @@ export const registerMany = (settingsArray = []) => {
 // Common
 export const { atomInstance: Atom_IsBackendReady, useHook: useStore_IsBackendReady } = createAtomWithHook(false, "IsBackendReady");
 export const { atomInstance: Atom_IsVrctAvailable, useHook: useStore_IsVrctAvailable } = createAtomWithHook(true, "IsVrctAvailable");
+export const { atomInstance: Atom_IsOscAvailable, useHook: useStore_IsOscAvailable } = createAtomWithHook(true, "IsOscAvailable");
 export const { atomInstance: Atom_ComputeMode, useHook: useStore_ComputeMode } = createAtomWithHook("", "ComputeMode");
 export const { atomInstance: Atom_IsOpenedConfigPage, useHook: useStore_IsOpenedConfigPage } = createAtomWithHook(false, "IsOpenedConfigPage");
 export const { atomInstance: Atom_MainFunctionsStateMemory, useHook: useStore_MainFunctionsStateMemory } = createAtomWithHook({
diff --git a/src-ui/views/app/config_page/setting_section/setting_box/others/Others.jsx b/src-ui/views/app/config_page/setting_section/setting_box/others/Others.jsx
index 3b32746a..a70a2300 100644
--- a/src-ui/views/app/config_page/setting_section/setting_box/others/Others.jsx
+++ b/src-ui/views/app/config_page/setting_section/setting_box/others/Others.jsx
@@ -1,7 +1,11 @@
 import { useI18n } from "@useI18n";
 import styles from "./Others.module.scss";
 
-import { useOpenFolder } from "@logics_common";
+import {
+    useOpenFolder,
+    useIsOscAvailable,
+} from "@logics_common";
+
 import {
     useOthers,
 } from "@logics_configs";
@@ -104,18 +108,14 @@ const AutoExportMessageLogsContainer = () => {
 export const VrcMicMuteSyncContainer = () => {
     const { t } = useI18n();
     const { currentEnableVrcMicMuteSync, toggleEnableVrcMicMuteSync } = useOthers();
-
-    const variable = {
-        state: currentEnableVrcMicMuteSync.state,
-        data: currentEnableVrcMicMuteSync.data.is_enabled,
-    };
+    const { currentIsOscAvailable } = useIsOscAvailable();
 
     return (
         <CheckboxContainer
             label={t("config_page.others.vrc_mic_mute_sync.label")}
             desc={t("config_page.others.vrc_mic_mute_sync.desc")}
-            variable={variable}
-            is_available={currentEnableVrcMicMuteSync.data.is_available}
+            variable={currentEnableVrcMicMuteSync}
+            is_available={currentIsOscAvailable.data}
             toggleFunction={toggleEnableVrcMicMuteSync}
         />
     );
diff --git a/src-ui/views/app/main_page/main_section/top_bar/right_side_components/RightSideComponents.jsx b/src-ui/views/app/main_page/main_section/top_bar/right_side_components/RightSideComponents.jsx
index 6c1ff7d3..d76616e0 100644
--- a/src-ui/views/app/main_page/main_section/top_bar/right_side_components/RightSideComponents.jsx
+++ b/src-ui/views/app/main_page/main_section/top_bar/right_side_components/RightSideComponents.jsx
@@ -4,7 +4,11 @@ import RefreshSvg from "@images/refresh.svg?react";
 import HelpSvg from "@images/help.svg?react";
 
 import { useStore_OpenedQuickSetting } from "@store";
-import { useSoftwareVersion } from "@logics_common";
+import {
+    useSoftwareVersion,
+    useIsOscAvailable,
+} from "@logics_common";
+
 import { useVr, useOthers } from "@logics_configs";
 import { OpenQuickSettingButton } from "./_buttons/OpenQuickSettingButton";
 
@@ -70,6 +74,7 @@ const PluginsQuickSetting = () => {
 const OpenVrcMicMuteSyncQuickSetting = () => {
     const { t } = useI18n();
     const { updateOpenedQuickSetting } = useStore_OpenedQuickSetting();
+    const { currentIsOscAvailable } = useIsOscAvailable();
     const { currentEnableVrcMicMuteSync } = useOthers();
 
     const onClickFunction = () => {
@@ -79,7 +84,8 @@ const OpenVrcMicMuteSyncQuickSetting = () => {
     return (
         <OpenQuickSettingButton
             label={t("config_page.others.vrc_mic_mute_sync.label")}
-            variable={currentEnableVrcMicMuteSync.data.is_enabled}
+            variable={currentEnableVrcMicMuteSync.data}
+            is_available={currentIsOscAvailable.data}
             onClickFunction={onClickFunction}
         />
     );
diff --git a/src-ui/views/app/main_page/main_section/top_bar/right_side_components/_buttons/OpenQuickSettingButton.jsx b/src-ui/views/app/main_page/main_section/top_bar/right_side_components/_buttons/OpenQuickSettingButton.jsx
index c24f40f4..c2d84773 100644
--- a/src-ui/views/app/main_page/main_section/top_bar/right_side_components/_buttons/OpenQuickSettingButton.jsx
+++ b/src-ui/views/app/main_page/main_section/top_bar/right_side_components/_buttons/OpenQuickSettingButton.jsx
@@ -1,21 +1,31 @@
 import { useI18n } from "@useI18n";
 import clsx from "clsx";
 import styles from "./OpenQuickSettingButton.module.scss";
+import WarningSvg from "@images/warning.svg?react";
 
 export const OpenQuickSettingButton = (props) => {
     const { t } = useI18n();
     const variable = (typeof props.variable === "boolean") ? props.variable : null;
+    const is_available = (typeof props.is_available === "boolean") ? props.is_available : true;
+
+    const getIndicatorLabelClassName = (base_classnames = []) => {
+        return clsx(...base_classnames, is_available && styles.is_available);
+    };
+
     return (
         <div className={styles.container}>
             <div className={styles.button_wrapper} onClick={props.onClickFunction}>
                 <p className={styles.button_label}>{props.label}</p>
                 {variable !== null && (
                     props.variable === true ? (
-                        <p className={clsx(styles.button_indicator_label, styles.enabled)}>
+                        <p className={getIndicatorLabelClassName([styles.button_indicator_label, styles.is_enabled])}>
                             {t("main_page.state_text_enabled")}
+                            {is_available === false && (
+                                <WarningSvg className={styles.warning_svg} />
+                            )}
                         </p>
                     ) : (
-                        <p className={clsx(styles.button_indicator_label, styles.disabled)}>
+                        <p className={getIndicatorLabelClassName([styles.button_indicator_label, styles.is_disabled])}>
                             {t("main_page.state_text_disabled")}
                         </p>
                     )
diff --git a/src-ui/views/app/main_page/main_section/top_bar/right_side_components/_buttons/OpenQuickSettingButton.module.scss b/src-ui/views/app/main_page/main_section/top_bar/right_side_components/_buttons/OpenQuickSettingButton.module.scss
index d46cbee0..92f741bb 100644
--- a/src-ui/views/app/main_page/main_section/top_bar/right_side_components/_buttons/OpenQuickSettingButton.module.scss
+++ b/src-ui/views/app/main_page/main_section/top_bar/right_side_components/_buttons/OpenQuickSettingButton.module.scss
@@ -26,10 +26,20 @@
 
 .button_indicator_label {
     font-size: 1rem;
-    &.disabled {
+    &.is_disabled {
         color: var(--dark_600_color);
     }
-    &.enabled {
+    &.is_enabled {
         color: var(--primary_300_color);
+        &:not(.is_available) {
+            color: var(--warning_color);
+        }
     }
+}
+
+.warning_svg {
+    margin-left: 0.4rem;
+    padding-bottom: 0.1rem;
+    width: 1.1rem;
+    color: var(--warning_color);
 }
\ No newline at end of file