diff --git a/app/src/main/java/keijumt/devandroid/App.kt b/app/src/main/java/keijumt/devandroid/App.kt
index 0960faa..b420221 100644
--- a/app/src/main/java/keijumt/devandroid/App.kt
+++ b/app/src/main/java/keijumt/devandroid/App.kt
@@ -1,9 +1,81 @@
 package keijumt.devandroid
 
+import android.app.Activity
 import android.app.Application
+import android.os.Bundle
+import android.support.v4.app.Fragment
+import android.support.v4.app.FragmentActivity
+import android.support.v4.app.FragmentManager
+import dagger.android.AndroidInjection
+import dagger.android.AndroidInjector
+import dagger.android.support.AndroidSupportInjection
+import dagger.android.support.DaggerApplication
+import dagger.android.support.HasSupportFragmentInjector
+import keijumt.devandroid.di.Injectable
+import keijumt.devandroid.di.Injector
 
-class App : Application() {
+class App : DaggerApplication() {
+
+    companion object {
+        /**
+         * Activity に dagger#inject を注入
+         *
+         * @param activity 注入したい Activity instance
+         */
+        private fun handleActivity(activity: Activity) {
+            if (activity is HasSupportFragmentInjector) {
+                AndroidInjection.inject(activity) /// Inject!!!!
+            }
+            (activity as? FragmentActivity)?.supportFragmentManager?.registerFragmentLifecycleCallbacks(
+                    object : FragmentManager.FragmentLifecycleCallbacks() {
+                        override fun onFragmentCreated(fm: FragmentManager?, f: Fragment?,
+                                                       savedInstanceState: Bundle?) {
+                            if (f is Injectable) {
+                                AndroidSupportInjection.inject(f)
+                            }
+                        }
+                    }, true)
+        }
+    }
+
     override fun onCreate() {
         super.onCreate()
+        setupActivityLifecycle()
+    }
+
+    override fun applicationInjector(): AndroidInjector<out DaggerApplication> {
+        return Injector.setup(this)
+    }
+
+    /**
+     * Activity ライフサイクル カスタマイズ
+     */
+    private fun setupActivityLifecycle() {
+        registerActivityLifecycleCallbacks(object : Application.ActivityLifecycleCallbacks {
+            override fun onActivityPaused(activity: Activity?) {
+            }
+
+            override fun onActivityResumed(activity: Activity?) {
+            }
+
+            override fun onActivityStarted(activity: Activity?) {
+            }
+
+            override fun onActivityDestroyed(activity: Activity?) {
+            }
+
+            override fun onActivitySaveInstanceState(activity: Activity?, bundle: Bundle?) {
+            }
+
+            override fun onActivityStopped(activity: Activity?) {
+            }
+
+            override fun onActivityCreated(activity: Activity?, bundle: Bundle?) {
+                activity?.let {
+                    handleActivity(it)
+                }
+            }
+
+        })
     }
 }
\ No newline at end of file
diff --git a/app/src/main/java/keijumt/devandroid/di/AppComponent.kt b/app/src/main/java/keijumt/devandroid/di/AppComponent.kt
new file mode 100644
index 0000000..7a16d2a
--- /dev/null
+++ b/app/src/main/java/keijumt/devandroid/di/AppComponent.kt
@@ -0,0 +1,34 @@
+package keijumt.devandroid.di
+
+import android.app.Application
+import dagger.BindsInstance
+import dagger.Component
+import dagger.android.AndroidInjector
+import dagger.android.support.AndroidSupportInjectionModule
+import keijumt.devandroid.App
+import keijumt.devandroid.di.module.ActivityModule
+import keijumt.devandroid.di.module.AppModule
+import javax.inject.Singleton
+
+@Singleton
+@Component(modules = arrayOf(
+        AndroidSupportInjectionModule::class,
+        AppModule::class,
+        ActivityModule::class
+))
+
+/**
+ * Component: Application 定義
+ */
+interface AppComponent : AndroidInjector<App> {
+
+    @Component.Builder
+    interface Builder {
+        @BindsInstance
+        fun application(application: Application): Builder
+
+        fun build(): AppComponent
+    }
+
+    override fun inject(application: App)
+}
\ No newline at end of file
diff --git a/app/src/main/java/keijumt/devandroid/di/Injectable.kt b/app/src/main/java/keijumt/devandroid/di/Injectable.kt
new file mode 100644
index 0000000..64b0d4b
--- /dev/null
+++ b/app/src/main/java/keijumt/devandroid/di/Injectable.kt
@@ -0,0 +1,7 @@
+package keijumt.devandroid.di
+
+/**
+ * Marks an activity / fragment injectable.
+ * ActivityかFragmentでフィールドインジェクションをしたい場合implementsする
+ */
+interface Injectable
\ No newline at end of file
diff --git a/app/src/main/java/keijumt/devandroid/di/Injector.kt b/app/src/main/java/keijumt/devandroid/di/Injector.kt
new file mode 100644
index 0000000..ff45a60
--- /dev/null
+++ b/app/src/main/java/keijumt/devandroid/di/Injector.kt
@@ -0,0 +1,22 @@
+package keijumt.devandroid.di
+
+import android.app.Application
+
+/**
+ * DI Helper
+ */
+object Injector {
+
+    private lateinit var applicationComponent: AppComponent
+
+    fun setup(application: Application): AppComponent {
+        applicationComponent = DaggerAppComponent.builder()
+                .application(application)
+                .build()
+        return applicationComponent
+    }
+
+    fun applicationComponent(): AppComponent {
+        return applicationComponent
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/keijumt/devandroid/di/module/ActivityModule.kt b/app/src/main/java/keijumt/devandroid/di/module/ActivityModule.kt
new file mode 100644
index 0000000..c90e923
--- /dev/null
+++ b/app/src/main/java/keijumt/devandroid/di/module/ActivityModule.kt
@@ -0,0 +1,11 @@
+package keijumt.devandroid.di.module
+
+import dagger.Module
+
+/**
+ * Module: Activity 定義
+ */
+@Module
+internal abstract class ActivityModule {
+
+}
\ No newline at end of file
diff --git a/app/src/main/java/keijumt/devandroid/di/module/AppModule.kt b/app/src/main/java/keijumt/devandroid/di/module/AppModule.kt
new file mode 100644
index 0000000..9ef89c2
--- /dev/null
+++ b/app/src/main/java/keijumt/devandroid/di/module/AppModule.kt
@@ -0,0 +1,23 @@
+package keijumt.devandroid.di.module
+
+import android.app.Application
+import android.content.Context
+import dagger.Module
+import dagger.Provides
+import javax.inject.Singleton
+
+/**
+ * Module: Application 定義
+ */
+@Module(includes = arrayOf(
+        ViewModelModule::class
+))
+class AppModule {
+    
+    @Singleton
+    @Provides
+    fun provideContext(application: Application): Context {
+        return application.applicationContext
+    }
+
+}
\ No newline at end of file
diff --git a/app/src/main/java/keijumt/devandroid/di/module/FragmentModule.kt b/app/src/main/java/keijumt/devandroid/di/module/FragmentModule.kt
new file mode 100644
index 0000000..7bc38f4
--- /dev/null
+++ b/app/src/main/java/keijumt/devandroid/di/module/FragmentModule.kt
@@ -0,0 +1,11 @@
+package keijumt.devandroid.di.module
+
+import dagger.Module
+
+/**
+ * Module: Fragment 定義
+ */
+@Module
+internal abstract class FragmentModule {
+
+}
\ No newline at end of file
diff --git a/app/src/main/java/keijumt/devandroid/di/module/ViewModelModule.kt b/app/src/main/java/keijumt/devandroid/di/module/ViewModelModule.kt
new file mode 100644
index 0000000..8051124
--- /dev/null
+++ b/app/src/main/java/keijumt/devandroid/di/module/ViewModelModule.kt
@@ -0,0 +1,26 @@
+package keijumt.devandroid.di.module
+
+import android.arch.lifecycle.ViewModel
+import android.arch.lifecycle.ViewModelProvider
+import dagger.Binds
+import dagger.MapKey
+import dagger.Module
+import keijumt.devandroid.viewmodel.ViewModelFactory
+import kotlin.reflect.KClass
+
+@MustBeDocumented
+@Target(AnnotationTarget.FUNCTION)
+@Retention(AnnotationRetention.RUNTIME)
+@MapKey
+internal annotation class ViewModelKey(val value: KClass<out ViewModel>)
+
+/**
+ * Module: ViewModel 定義
+ */
+@Module
+internal abstract class ViewModelModule {
+
+    @Binds
+    abstract fun bindViewModelFactory(factory: ViewModelFactory): ViewModelProvider.Factory
+
+}
\ No newline at end of file
diff --git a/app/src/main/java/keijumt/devandroid/viewmodel/ViewModelFactory.kt b/app/src/main/java/keijumt/devandroid/viewmodel/ViewModelFactory.kt
new file mode 100644
index 0000000..ac22fa9
--- /dev/null
+++ b/app/src/main/java/keijumt/devandroid/viewmodel/ViewModelFactory.kt
@@ -0,0 +1,32 @@
+package keijumt.devandroid.viewmodel
+
+import android.arch.lifecycle.ViewModel
+import android.arch.lifecycle.ViewModelProvider
+import javax.inject.Inject
+import javax.inject.Provider
+
+/**
+ * Factory: ViewModel
+ */
+class ViewModelFactory @Inject constructor(private val creators: Map<Class<out ViewModel>, @JvmSuppressWildcards Provider<ViewModel>>)
+    : ViewModelProvider.Factory {
+
+    @Suppress("UNCHECKED_CAST")
+    override fun <T : ViewModel> create(modelClass: Class<T>): T {
+        var creator: Provider<ViewModel>? = creators[modelClass]
+        if (creator == null) {
+            for ((key, value) in creators) {
+                if (modelClass.isAssignableFrom(key)) {
+                    creator = value
+                    break
+                }
+            }
+        }
+        if (creator == null) throw IllegalArgumentException("unknown model class " + modelClass)
+        try {
+            return creator.get() as T
+        } catch (e: Exception) {
+            throw RuntimeException(e)
+        }
+    }
+}
\ No newline at end of file