diff --git a/src/api/models/othello-game.ts b/src/api/models/othello-game.ts
index 82c0042108..b9d33007bf 100644
--- a/src/api/models/othello-game.ts
+++ b/src/api/models/othello-game.ts
@@ -30,6 +30,7 @@ export interface IGame {
 		map: string[];
 		bw: string | number;
 		is_llotheo: boolean;
+		can_put_everywhere: boolean;
 	};
 }
 
diff --git a/src/api/stream/othello-game.ts b/src/api/stream/othello-game.ts
index cc936805ba..05f244f769 100644
--- a/src/api/stream/othello-game.ts
+++ b/src/api/stream/othello-game.ts
@@ -125,7 +125,8 @@ export default function(request: websocket.request, connection: websocket.connec
 
 				//#region 盤面に最初から石がないなどして始まった瞬間に勝敗が決定する場合があるのでその処理
 				const o = new Othello(map, {
-					isLlotheo: freshGame.settings.is_llotheo
+					isLlotheo: freshGame.settings.is_llotheo,
+					canPutEverywhere: freshGame.settings.can_put_everywhere
 				});
 
 				if (o.isEnded) {
@@ -166,7 +167,8 @@ export default function(request: websocket.request, connection: websocket.connec
 		if (!game.user1_id.equals(user._id) && !game.user2_id.equals(user._id)) return;
 
 		const o = new Othello(game.settings.map, {
-			isLlotheo: game.settings.is_llotheo
+			isLlotheo: game.settings.is_llotheo,
+			canPutEverywhere: game.settings.can_put_everywhere
 		});
 
 		game.logs.forEach(log => {
diff --git a/src/common/othello/core.ts b/src/common/othello/core.ts
index fc432b2ced..851f1b79c7 100644
--- a/src/common/othello/core.ts
+++ b/src/common/othello/core.ts
@@ -3,6 +3,7 @@ export type MapPixel = 'null' | 'empty';
 
 export type Options = {
 	isLlotheo: boolean;
+	canPutEverywhere: boolean;
 };
 
 /**
@@ -26,23 +27,29 @@ export default class Othello {
 	 * ゲームを初期化します
 	 */
 	constructor(map: string[], opts: Options) {
+		//#region Options
 		this.opts = opts;
+		if (this.opts.isLlotheo == null) this.opts.isLlotheo = false;
+		if (this.opts.canPutEverywhere == null) this.opts.canPutEverywhere = false;
+		//#endregion
 
+		//#region Parse map data
 		this.mapWidth = map[0].length;
 		this.mapHeight = map.length;
 		const mapData = map.join('');
 
-		// Parse map data
 		this.board = mapData.split('').map(d => {
 			if (d == '-') return null;
 			if (d == 'b') return 'black';
 			if (d == 'w') return 'white';
 			return undefined;
 		});
+
 		this.map = mapData.split('').map(d => {
 			if (d == '-' || d == 'b' || d == 'w') return 'empty';
 			return 'null';
 		});
+		//#endregion
 
 		// Init stats
 		this.stats = [{
@@ -175,14 +182,21 @@ export default class Othello {
 	}
 
 	/**
-	 * 指定のマスに石を打つことができるかどうか(相手の石を1つでも反転させられるか)を取得します
+	 * 指定のマスに石を打つことができるかどうかを取得します
 	 * @param color 自分の色
 	 * @param pos 位置
 	 */
 	public canPut(color: Color, pos: number): boolean {
 		// 既に石が置いてある場所には打てない
 		if (this.get(pos) !== null) return false;
-		return this.effects(color, pos).length !== 0;
+
+		if (this.opts.canPutEverywhere) {
+			// 挟んでなくても置けるモード
+			return this.mapDataGet(pos) == 'empty';
+		} else {
+			// 相手の石を1つでも反転させられるか
+			return this.effects(color, pos).length !== 0;
+		}
 	}
 
 	/**
diff --git a/src/web/app/common/views/components/othello.game.vue b/src/web/app/common/views/components/othello.game.vue
index 26612daeac..fa3ed8d9a5 100644
--- a/src/web/app/common/views/components/othello.game.vue
+++ b/src/web/app/common/views/components/othello.game.vue
@@ -89,7 +89,8 @@ export default Vue.extend({
 		logPos(v) {
 			if (!this.game.is_ended) return;
 			this.o = new Othello(this.game.settings.map, {
-				isLlotheo: this.game.settings.is_llotheo
+				isLlotheo: this.game.settings.is_llotheo,
+				canPutEverywhere: this.game.settings.can_put_everywhere
 			});
 			this.logs.forEach((log, i) => {
 				if (i < v) {
@@ -102,7 +103,8 @@ export default Vue.extend({
 
 	created() {
 		this.o = new Othello(this.game.settings.map, {
-			isLlotheo: this.game.settings.is_llotheo
+			isLlotheo: this.game.settings.is_llotheo,
+			canPutEverywhere: this.game.settings.can_put_everywhere
 		});
 
 		this.game.logs.forEach(log => {
diff --git a/src/web/app/common/views/components/othello.room.vue b/src/web/app/common/views/components/othello.room.vue
index 745074b17a..b7c28ae67d 100644
--- a/src/web/app/common/views/components/othello.room.vue
+++ b/src/web/app/common/views/components/othello.room.vue
@@ -26,6 +26,7 @@
 
 	<div class="rules">
 		<mk-switch v-model="game.settings.is_llotheo" @change="updateSettings" text="石の少ない方が勝ち(ロセオ)"/>
+		<mk-switch v-model="game.settings.can_put_everywhere" @change="updateSettings" text="どこでも置けるモード"/>
 		<div>
 			<el-radio v-model="game.settings.bw" label="random" @change="updateSettings">ランダム</el-radio>
 			<el-radio v-model="game.settings.bw" :label="1" @change="updateSettings">{{ game.user1.name }}が黒</el-radio>