diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5b7ae082156f..d44063ac2799 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -22,6 +22,7 @@
   (Based on https://github.com/Otaku-Social/maniakey/pull/14)
 - Enhance: AiScriptの拡張API関数において引数の型チェックをより厳格に
 - Enhance: クエリパラメータでuiを一時的に変更できるように #15240
+- Enhance: Blueskyの投稿埋め込みプレビューに対応
 - Fix: 画面サイズが変わった際にナビゲーションバーが自動で折りたたまれない問題を修正
 - Fix: サーバー情報メニューに区切り線が不足していたのを修正
 - Fix: ノートがログインしているユーザーしか見れない場合にログインダイアログを閉じるとその後の動線がなくなる問題を修正
diff --git a/locales/index.d.ts b/locales/index.d.ts
index b98fd5d423b6..3834bff7a9d7 100644
--- a/locales/index.d.ts
+++ b/locales/index.d.ts
@@ -2593,7 +2593,7 @@ export interface Locale extends ILocale {
     /**
      * ポストを展開する
      */
-    "expandTweet": string;
+    "expandPost": string;
     /**
      * テーマエディター
      */
diff --git a/locales/ja-JP.yml b/locales/ja-JP.yml
index 638f2a69c352..24b6e9c07d5e 100644
--- a/locales/ja-JP.yml
+++ b/locales/ja-JP.yml
@@ -643,7 +643,7 @@ poll: "アンケート"
 useCw: "内容を隠す"
 enablePlayer: "プレイヤーを開く"
 disablePlayer: "プレイヤーを閉じる"
-expandTweet: "ポストを展開する"
+expandPost: "ポストを展開する"
 themeEditor: "テーマエディター"
 description: "説明"
 describeFile: "キャプションを付ける"
diff --git a/packages/frontend/src/components/MkUrlPreview.vue b/packages/frontend/src/components/MkUrlPreview.vue
index f0da8fd3f2bb..d607b8ff2629 100644
--- a/packages/frontend/src/components/MkUrlPreview.vue
+++ b/packages/frontend/src/components/MkUrlPreview.vue
@@ -26,19 +26,34 @@ SPDX-License-Identifier: AGPL-3.0-only
 		</MkButton>
 	</div>
 </template>
-<template v-else-if="tweetId && tweetExpanded">
-	<div ref="twitter">
+<template v-else-if="tweetId && postExpanded">
+	<div>
 		<iframe
-			ref="tweet"
 			allow="fullscreen;web-share"
 			sandbox="allow-popups allow-popups-to-escape-sandbox allow-scripts allow-same-origin"
 			scrolling="no"
-			:style="{ position: 'relative', width: '100%', height: `${tweetHeight}px`, border: 0 }"
+			:style="{ position: 'relative', width: '100%', height: `${postHeight}px`, border: 0 }"
 			:src="`https://platform.twitter.com/embed/index.html?embedId=${embedId}&amp;hideCard=false&amp;hideThread=false&amp;lang=en&amp;theme=${defaultStore.state.darkMode ? 'dark' : 'light'}&amp;id=${tweetId}`"
 		></iframe>
 	</div>
 	<div :class="$style.action">
-		<MkButton :small="true" inline @click="tweetExpanded = false">
+		<MkButton :small="true" inline @click="postExpanded = false">
+			<i class="ti ti-x"></i> {{ i18n.ts.close }}
+		</MkButton>
+	</div>
+</template>
+<template v-else-if="bskyDid && bskyPostRecordKey && postExpanded">
+	<div>
+		<iframe
+			allow="fullscreen;web-share"
+			sandbox="allow-popups allow-popups-to-escape-sandbox allow-scripts allow-same-origin"
+			scrolling="no"
+			:style="{ position: 'relative', width: '100%', height: `${postHeight}px`, border: 0 }"
+			:src="`https://embed.bsky.app/embed/${bskyDid}/app.bsky.feed.post/${bskyPostRecordKey}?id=${embedId}&colorMode=system`"
+		></iframe>
+	</div>
+	<div :class="$style.action">
+		<MkButton :small="true" inline @click="postExpanded = false">
 			<i class="ti ti-x"></i> {{ i18n.ts.close }}
 		</MkButton>
 	</div>
@@ -66,8 +81,13 @@ SPDX-License-Identifier: AGPL-3.0-only
 	</component>
 	<template v-if="showActions">
 		<div v-if="tweetId" :class="$style.action">
-			<MkButton :small="true" inline @click="tweetExpanded = true">
-				<i class="ti ti-brand-x"></i> {{ i18n.ts.expandTweet }}
+			<MkButton :small="true" inline @click="postExpanded = true">
+				<i class="ti ti-brand-x"></i> {{ i18n.ts.expandPost }}
+			</MkButton>
+		</div>
+		<div v-if="bskyPostRecordKey" :class="$style.action">
+			<MkButton :small="true" inline @click="openBskyEmbed">
+				<i class="ti ti-brand-bluesky"></i> {{ i18n.ts.expandPost }}
 			</MkButton>
 		</div>
 		<div v-if="!playerEnabled && player.url" :class="$style.action">
@@ -126,10 +146,17 @@ const player = ref({
 	height: null,
 } as SummalyResult['player']);
 const playerEnabled = ref(false);
-const tweetId = ref<string | null>(null);
-const tweetExpanded = ref(props.detail);
+
 const embedId = `embed${Math.random().toString().replace(/\D/, '')}`;
-const tweetHeight = ref(150);
+const postExpanded = ref(props.detail);
+const postHeight = ref(150);
+
+const tweetId = ref<string | null>(null);
+
+const bskyHandleOrDid = ref<string | null>(null);
+const bskyDid = ref<string | null>(null);
+const bskyPostRecordKey = ref<string | null>(null);
+
 const unknownUrl = ref(false);
 
 onDeactivated(() => {
@@ -144,6 +171,19 @@ if (requestUrl.hostname === 'twitter.com' || requestUrl.hostname === 'mobile.twi
 	if (m) tweetId.value = m[1];
 }
 
+if (requestUrl.hostname === 'bsky.app') {
+	const bskyPostPageUrl = requestUrl.pathname.slice(1).split('/');
+
+	if (bskyPostPageUrl[0] === 'profile' && bskyPostPageUrl[1] && bskyPostPageUrl[2] === 'post' && bskyPostPageUrl[3]) {
+		bskyHandleOrDid.value = bskyPostPageUrl[1];
+		bskyPostRecordKey.value = bskyPostPageUrl[3];
+
+		if (postExpanded.value) {
+			openBskyEmbed();
+		}
+	}
+}
+
 if (requestUrl.hostname === 'music.youtube.com' && requestUrl.pathname.match('^/(?:watch|channel)')) {
 	requestUrl.hostname = 'www.youtube.com';
 }
@@ -180,13 +220,23 @@ window.fetch(`/url?url=${encodeURIComponent(requestUrl.href)}&lang=${versatileLa
 		sensitive.value = info.sensitive ?? false;
 	});
 
-function adjustTweetHeight(message: MessageEvent) {
-	if (message.origin !== 'https://platform.twitter.com') return;
-	const embed = message.data?.['twttr.embed'];
-	if (embed?.method !== 'twttr.private.resize') return;
-	if (embed?.id !== embedId) return;
-	const height = embed?.params[0]?.height;
-	if (height) tweetHeight.value = height;
+async function openBskyEmbed() {
+	if (bskyHandleOrDid.value == null || bskyPostRecordKey.value == null) return;
+
+	if (bskyDid.value == null) {
+		if (bskyHandleOrDid.value.startsWith('did:')) {
+			bskyDid.value = bskyHandleOrDid.value;
+		} else {
+			// handleで来ている場合はdidに変換
+			const bskyApiRes = await window.fetch(`https://public.api.bsky.app/xrpc/com.atproto.identity.resolveHandle?handle=${bskyHandleOrDid.value}`);
+			if (bskyApiRes.ok) {
+				const bskyApiData = await bskyApiRes.json() as { did: string };
+				bskyDid.value = bskyApiData.did;
+			}
+		}
+	}
+
+	postExpanded.value = true;
 }
 
 function openPlayer(): void {
@@ -199,10 +249,25 @@ function openPlayer(): void {
 	});
 }
 
-window.addEventListener('message', adjustTweetHeight);
+function adjustSocialsEmbedHeight(message: MessageEvent) {
+	if (message.origin === 'https://platform.twitter.com') {
+		const embed = message.data?.['twttr.embed'];
+		if (embed?.method === 'twttr.private.resize' && embed?.id === embedId) {
+			const height = embed?.params[0]?.height;
+			if (height) postHeight.value = height;
+		}
+	} else if (message.origin === 'https://embed.bsky.app') {
+		if (message.data?.id === embedId) {
+			const height = message.data?.height;
+			if (height) postHeight.value = height;
+		}
+	}
+}
+
+window.addEventListener('message', adjustSocialsEmbedHeight);
 
 onUnmounted(() => {
-	window.removeEventListener('message', adjustTweetHeight);
+	window.removeEventListener('message', adjustSocialsEmbedHeight);
 });
 </script>
 
diff --git a/packages/frontend/src/index.html b/packages/frontend/src/index.html
index 84ba9dfabc41..922d4dea0cf8 100644
--- a/packages/frontend/src/index.html
+++ b/packages/frontend/src/index.html
@@ -23,7 +23,7 @@
 			font-src 'self' data:;
 			img-src 'self' data: blob: www.google.com xn--931a.moe localhost:3000 localhost:5173 127.0.0.1:5173 127.0.0.1:3000;
 			media-src 'self' localhost:3000 localhost:5173 127.0.0.1:5173 127.0.0.1:3000;
-			connect-src 'self' localhost:3000 localhost:5173 127.0.0.1:5173 127.0.0.1:3000 https://newassets.hcaptcha.com;
+			connect-src 'self' localhost:3000 localhost:5173 127.0.0.1:5173 127.0.0.1:3000 https://newassets.hcaptcha.com https://public.api.bsky.app;
 			frame-src *;"
 	/>
 	<meta property="og:site_name" content="[DEV BUILD] Misskey" />