diff --git a/app/src/main/java/jp/atled/agileworks/model/AppRepository.kt b/app/src/main/java/jp/atled/agileworks/model/AppRepository.kt
new file mode 100644
index 0000000000000000000000000000000000000000..87de81df651a202507385686220ea063fdd6db1b
--- /dev/null
+++ b/app/src/main/java/jp/atled/agileworks/model/AppRepository.kt
@@ -0,0 +1,17 @@
+package jp.atled.agileworks.model
+
+class AppRepository {
+    fun getAppBackGroundStatus(): Boolean {
+        return appBackGroundStatus
+    }
+
+    fun setAppBackGroundStatus(status: Boolean) {
+        appBackGroundStatus = status
+    }
+
+    companion object {
+        fun getInstance() = AppRepository()
+        // アプリがバックグラウンドか
+        private var appBackGroundStatus = false
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/jp/atled/agileworks/view/base/BaseViewModel.kt b/app/src/main/java/jp/atled/agileworks/view/base/BaseViewModel.kt
index 31e7adecf0a97477a7ec4983e0293be98eb607cb..13d7ef43b4393eccecc0abaa39c4d7d186fa64b9 100644
--- a/app/src/main/java/jp/atled/agileworks/view/base/BaseViewModel.kt
+++ b/app/src/main/java/jp/atled/agileworks/view/base/BaseViewModel.kt
@@ -2,10 +2,20 @@ package jp.atled.agileworks.view.base
 
 import androidx.lifecycle.MutableLiveData
 import androidx.lifecycle.ViewModel
+import jp.atled.agileworks.model.AppRepository
 
 open class BaseViewModel : ViewModel() {
 
     val dataLoading = MutableLiveData<Boolean>().apply { value = false }
 
     val logout = MutableLiveData<Boolean>()
+
+    fun getAppBackGroundStatus(): Boolean {
+        return AppRepository.getInstance().getAppBackGroundStatus()
+    }
+
+    fun setAppBackGroundStatus(status: Boolean) {
+        AppRepository.getInstance().setAppBackGroundStatus(status)
+    }
+
 }
\ No newline at end of file
diff --git a/app/src/main/java/jp/atled/agileworks/view/ui/documentweb/DocumentWebFragment.kt b/app/src/main/java/jp/atled/agileworks/view/ui/documentweb/DocumentWebFragment.kt
index 6fe824773832bc605aeacc6b69ac21f5d532f655..f4f7cb3153912486dcb27c6199d054020a05e777 100644
--- a/app/src/main/java/jp/atled/agileworks/view/ui/documentweb/DocumentWebFragment.kt
+++ b/app/src/main/java/jp/atled/agileworks/view/ui/documentweb/DocumentWebFragment.kt
@@ -12,8 +12,6 @@ import android.webkit.CookieManager
 import android.webkit.WebView
 import android.widget.Button
 import android.widget.RelativeLayout
-import android.widget.TextView
-import android.widget.Toolbar
 import androidx.core.view.GestureDetectorCompat
 import androidx.fragment.app.Fragment
 import androidx.lifecycle.ViewModelProvider
@@ -89,6 +87,9 @@ class DocumentWebFragment : Fragment(), DocumentWebPresenter {
         displayDisconnectViewState()
 
         webShare.presenter.updateAutoReloadState(true)
+
+        // アプリがバックグラウンドかの情報
+        viewDataBinding?.viewModel?.setAppBackGroundStatus(false)
     }
 
     override fun onDestroyView() {
@@ -116,6 +117,8 @@ class DocumentWebFragment : Fragment(), DocumentWebPresenter {
         } catch (e: Exception) {
             Log.e(TAG, "${e.message}")
         }
+        // バックグラウンドかの情報
+        viewDataBinding?.viewModel?.setAppBackGroundStatus(true)
     }
 
     @SuppressLint("ClickableViewAccessibility")
diff --git a/app/src/main/java/jp/atled/agileworks/view/ui/login/LoginFragment.kt b/app/src/main/java/jp/atled/agileworks/view/ui/login/LoginFragment.kt
index 0b4d81da233d6c0f94e0c4747ca871085cbd394c..53137cb0325e5df35834aaad945cf4e1208cf3fd 100644
--- a/app/src/main/java/jp/atled/agileworks/view/ui/login/LoginFragment.kt
+++ b/app/src/main/java/jp/atled/agileworks/view/ui/login/LoginFragment.kt
@@ -75,16 +75,23 @@ class LoginFragment: Fragment() {
             } else {
                 // 過去に認証したときの authState を取得
                 if (mOAuthService.getAuthState(savedInstanceState).isAuthorized) {
-                    // 認証済みの場合、生体/デバイス認証を実行
-                    Log.d(TAG, "authState.isAuthorized == true")
-                    if (BiometricPrompt.anyAuthenticationAvailable(this.requireContext())) {
+                    if (binding.viewmodel?.getAppBackGroundStatus() == true) {
+                        Log.d(TAG, "authState.isAuthorized == true")
+                        Log.d(TAG,"appBackGroundStatus == true")
                         disableLogin()
-                        Handler().postDelayed({
-                            startBiometricPrompt()
-                        }, 0)
+                        onSuccessAuth()
                     } else {
-                        // 認証設定が全くされていない場合、一旦ログアウトしてから同じサーバ・ドメインで OAuth2 認証を再実行
-                        relogin()
+                        // 認証済みの場合、生体/デバイス認証を実行
+                        Log.d(TAG, "authState.isAuthorized == true")
+                        if (BiometricPrompt.anyAuthenticationAvailable(this.requireContext())) {
+                            disableLogin()
+                            Handler().postDelayed({
+                                startBiometricPrompt()
+                            }, 0)
+                        } else {
+                            // 認証設定が全くされていない場合、一旦ログアウトしてから同じサーバ・ドメインで OAuth2 認証を再実行
+                            relogin()
+                        }
                     }
                 } else {
                     // 認証されていない場合、ログイン画面を表示
@@ -243,7 +250,7 @@ class LoginFragment: Fragment() {
         Log.d(TAG, "call startBiometricPrompt()")
         BiometricPrompt.auth(this.requireActivity()) {
             when (it) {
-                BiometricPrompt.Result.Success -> onSuccessBiometricAuth()
+                BiometricPrompt.Result.Success -> onSuccessAuth()
                 BiometricPrompt.Result.UnsupportedHardware -> onFailureAuthBiometricPrompt(R.string.auth_biometric_unsupported_hardware)
                 BiometricPrompt.Result.NotHasBiometricsOnHardware -> onFailureAuthBiometricPrompt(R.string.auth_biometric_not_has_biometrics_on_hardware)
                 BiometricPrompt.Result.Cancel -> onFailureAuthBiometricPrompt(R.string.auth_biometric_cancel)
@@ -252,9 +259,9 @@ class LoginFragment: Fragment() {
         }
     }
 
-    private fun onSuccessBiometricAuth() {
-        // 生体認証に成功した場合、トークンを更新
-        Log.d(TAG, "call onSuccessBiometricAuth()")
+    private fun onSuccessAuth() {
+        // トークンを更新
+        Log.d(TAG, "call onSuccessAuth()")
         mOAuthService.performAction(AuthState.AuthStateAction() {
             accessToken, _, ex ->
             if (ex != null) {