diff --git a/src/parser/syntaxes/expressions.ts b/src/parser/syntaxes/expressions.ts
index 5d6e2641..ca86cd95 100644
--- a/src/parser/syntaxes/expressions.ts
+++ b/src/parser/syntaxes/expressions.ts
@@ -565,7 +565,10 @@ function parseObject(s: ITokenStream, isStatic: boolean): Ast.Obj {
 
 	const map = new Map<string, Ast.Expression>();
 	while (!s.is(TokenKind.CloseBrace)) {
-		s.expect(TokenKind.Identifier);
+		const keyTokenKind = s.getTokenKind();
+		if (keyTokenKind !== TokenKind.Identifier && keyTokenKind !== TokenKind.StringLiteral) {
+			throw unexpectedTokenError(keyTokenKind, s.getPos());
+		}
 		const k = s.getTokenValue();
 		s.next();
 
diff --git a/test/index.ts b/test/index.ts
index af97bf11..e66b855b 100644
--- a/test/index.ts
+++ b/test/index.ts
@@ -198,6 +198,8 @@ describe('Object', () => {
 	});
 
 	/* 未実装
+	 * see also: test/literals.ts > literal > obj (string key)
+	 * issue: https://github.com/aiscript-dev/aiscript/issues/62
 	test.concurrent('string key', async () => {
 		const res = await exe(`
 		let obj = {
diff --git a/test/literals.ts b/test/literals.ts
index 772ba990..462cb5b7 100644
--- a/test/literals.ts
+++ b/test/literals.ts
@@ -130,6 +130,15 @@ describe('literal', () => {
 		eq(res, OBJ(new Map([['a', NUM(1)], ['b', NUM(2)], ['c', NUM(3)]])));
 	});
 
+	test.concurrent('obj (string key)', async () => {
+		const res = await exe(`
+		<: {
+			"藍": 42,
+		}
+		`);
+		eq(res, OBJ(new Map([['藍', NUM(42)]])));
+	});
+
 	test.concurrent('obj and arr (separated by line break)', async () => {
 		const res = await exe(`
 		<: {
diff --git a/unreleased/object-key-string.md b/unreleased/object-key-string.md
new file mode 100644
index 00000000..b04b8f29
--- /dev/null
+++ b/unreleased/object-key-string.md
@@ -0,0 +1 @@
+- オブジェクトリテラルのキーに文字列リテラルを記述できるようになりました。