diff --git a/milkcocoa/milkcocoa-tests.ts b/milkcocoa/milkcocoa-tests.ts
new file mode 100644
index 0000000000..2a34b4e1b7
--- /dev/null
+++ b/milkcocoa/milkcocoa-tests.ts
@@ -0,0 +1,37 @@
+///<reference path="./milkcocoa.d.ts"/>
+var mk = new MilkCocoa("hostAddress");
+mk.addAccount("sample@test.com", "password", null, (err: MilkCocoa.Error.AddAccount, user: milkcocoa.User) => {
+  
+  switch (err) {
+    case null:
+      console.log("Done.");
+      break;
+    case MilkCocoa.Error.AddAccount.FormatError:
+      console.log("Invalid mail address.");
+      break;
+    case MilkCocoa.Error.AddAccount.AlreadyExist:
+      console.log("Already added account.");
+      break;
+  }
+});
+mk.login("sample@test.com", "password", (err: MilkCocoa.Error.Login, user: User) => {
+  if (err === MilkCocoa.Error.Login.FormatError) {
+    console.log("Invalid mail address.");
+  } else if (err === MilkCocoa.Error.Login.LoginError) {
+    console.log("Or Email that is not registered, it is not a valid password.");
+  } else if (err === MilkCocoa.Error.Login.EmailNotVerificated) {
+    console.log("Still account is temporary registration.");
+  } else {
+    //成功時はユーザIDを取得できます。
+    var user_id = user.id;
+  }
+});
+mk.dataStore("datastore").push({ message: "this is message." }, (data: DataStoreCallbackData) => {
+  console.log("pushed.");
+});
+mk.dataStore("datastore").child("chat").child("message").on("push", (data: DataStoreCallbackData) => {
+  console.log(data.value.message);
+});
+mk.dataStore("datastore").child("chat").child("message").query().limit(10).done((data) => {
+  console.log(data.message);
+});
diff --git a/milkcocoa/milkcocoa-tests.ts.tscparams b/milkcocoa/milkcocoa-tests.ts.tscparams
new file mode 100644
index 0000000000..934bc29ef2
--- /dev/null
+++ b/milkcocoa/milkcocoa-tests.ts.tscparams
@@ -0,0 +1 @@
+--noImplicitAny
\ No newline at end of file
diff --git a/milkcocoa/milkcocoa.d.ts b/milkcocoa/milkcocoa.d.ts
new file mode 100644
index 0000000000..385137350d
--- /dev/null
+++ b/milkcocoa/milkcocoa.d.ts
@@ -0,0 +1,75 @@
+// Type definitions for Milkcocoa 0.2.8
+// Project: https://mlkcca.com/
+// Definitions by: odangosan <https://github.com/odangosan>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+// Api Reference : https://mlkcca.com/document/api-js.html
+
+declare module milkcocoa {
+  class MilkCocoa {
+    constructor(host: string, callback?: Function);
+    dataStore(path: string): DataStore;
+    addAccount(email: string, password: string, options?: {}, callback?: (err: MilkCocoa.Error.AddAccount, user: User) => void): void;
+    login(email: string, password: string, callback: (err: MilkCocoa.Error.Login, user: User) => void): void;
+    logout(callback?: (err: string) => void): void;
+    getCurrentUser(callback: (err: MilkCocoa.Error.GetCurrentUser, user: { id: string }) => void): void;
+  }
+
+  module MilkCocoa {
+    module Error {
+      enum AddAccount {
+        // FormatError = 1, AlreadyExist = 2
+        FormatError, AlreadyExist
+      }
+      enum Login {
+        // FormatError = 1, LoginError = 2, EmailNotVerificated = 3
+        FormatError, LoginError, EmailNotVerificated
+      }
+      enum GetCurrentUser {
+        // NotLoggedIn = 1
+        NotLoggedIn
+      }
+    }
+  }
+
+  interface DataStore {
+    push(object: {}, callback?: (data: DataStoreCallbackData) => void): void;
+    set(id: string, data: {}): void;
+    remove(id: string): void;
+    send(object: {}): void;
+    // event push, remove, set, send
+    on(event: string, callback: (data: DataStoreCallbackData) => void): void;
+    off(event: string): void;
+    get(id: string, callback: (data: {}) => void): void;
+    query(condition?: {}): Query;
+    child(path: string): DataStore;
+    parent(): DataStore;
+    root(): DataStore;
+  }
+
+  interface DataStoreCallbackData {
+    err: string;
+    path: string;
+    id: string;
+    value: any;
+  }
+
+  interface Query {
+    done(callback: (data: any) => void): void;
+    limit(number: number): Query;
+    skip(index: number): Query;
+    // mode  asc, desc
+    sort(mode: string): Query;
+  }
+
+  interface User {
+    id: string;
+    email: string;
+    option: {};
+  }
+}
+
+import MilkCocoa = milkcocoa.MilkCocoa;
+import User = milkcocoa.User;
+import Query = milkcocoa.Query;
+import DataStore = milkcocoa.DataStore;
+import DataStoreCallbackData = milkcocoa.DataStoreCallbackData;
\ No newline at end of file
diff --git a/milkcocoa/milkcocoa.d.ts.tscparams b/milkcocoa/milkcocoa.d.ts.tscparams
new file mode 100644
index 0000000000..934bc29ef2
--- /dev/null
+++ b/milkcocoa/milkcocoa.d.ts.tscparams
@@ -0,0 +1 @@
+--noImplicitAny
\ No newline at end of file