diff --git a/packages/client/src/os.ts b/packages/client/src/os.ts
index 9eac06a5e3..48a558a363 100644
--- a/packages/client/src/os.ts
+++ b/packages/client/src/os.ts
@@ -12,6 +12,16 @@ import { resolve } from '@/router';
 import { $i } from '@/account';
 import { defaultStore } from '@/store';
 
+export let isScreenTouching = false;
+
+window.addEventListener('touchstart', () => {
+	isScreenTouching = true;
+}, { passive: true });
+
+window.addEventListener('touchend', () => {
+	isScreenTouching = false;
+}, { passive: true });
+
 export const stream = markRaw(new Misskey.Stream(url, $i));
 
 export const pendingApiRequestsCount = ref(0);
diff --git a/packages/client/src/scripts/use-tooltip.ts b/packages/client/src/scripts/use-tooltip.ts
index 2c0c36400d..89e6b1be9d 100644
--- a/packages/client/src/scripts/use-tooltip.ts
+++ b/packages/client/src/scripts/use-tooltip.ts
@@ -1,3 +1,4 @@
+import { isScreenTouching } from '@/os';
 import { Ref, ref } from 'vue';
 
 export function useTooltip(onShow: (showing: Ref<boolean>) => void) {
@@ -10,6 +11,10 @@ export function useTooltip(onShow: (showing: Ref<boolean>) => void) {
 		close();
 		if (!isHovering) return;
 
+		// iOS(Androidも？)では、要素をタップした直後に(おせっかいで)mouseoverイベントを発火させたりするため、その対策
+		// これが無いと、画面に触れてないのにツールチップが出たりしてしまう
+		if (!isScreenTouching) return;
+
 		const showing = ref(true);
 		onShow(showing);
 		changeShowingState = () => {