diff --git a/app/controllers/users_controller.rb b/app/controllers/users_controller.rb
index bcee8ca..9fe1623 100644
--- a/app/controllers/users_controller.rb
+++ b/app/controllers/users_controller.rb
@@ -1,7 +1,28 @@
 class UsersController < ApplicationController
   before_action :login_required
+  before_action :find_user
 
-  def index
-    @users = User.all
+  def show
+  end
+
+  def update
+    unless @user.authenticate(user_params[:current_password])
+      @user.errors.add(:current_password, :wrong_password)
+      return render :show
+    end
+    unless @user.update_attributes(user_params)
+      return render :show
+    end
+    redirect_to misc_user_path
+  end
+
+  private
+
+  def find_user
+    @user = User.first # user is only "admin"
+  end
+
+  def user_params
+    params.require(:user).permit(:current_password, :password, :password_confirmation)
   end
 end
diff --git a/app/models/user.rb b/app/models/user.rb
index 70c745a..2a4e75a 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -1,8 +1,11 @@
 class User < ActiveRecord::Base
   has_secure_password
 
+  attr_accessor :current_password
+
   validates :name, uniqueness: true, presence: true
   validates :remember_token, uniqueness: true, allow_nil: true
+  validates :password, length: { minimum: 8 }
 
   def generate_remember_token
     begin
diff --git a/app/views/shared/_global_nav.html.erb b/app/views/shared/_global_nav.html.erb
index 588e16c..062733e 100644
--- a/app/views/shared/_global_nav.html.erb
+++ b/app/views/shared/_global_nav.html.erb
@@ -24,7 +24,7 @@
         <%= link_to_other t("miscs.information.page_title"), information_misc_path %>
       </li>
       <li>
-        <%= link_to_other t('miscs.users.page_title'), misc_users_path %>
+        <%= link_to_other t('users.show.page_title'), misc_user_path %>
       </li>
     </ul>
     <!-- /.nav-second-level -->
diff --git a/app/views/users/index.html.haml b/app/views/users/index.html.haml
deleted file mode 100644
index 1c8fa6c..0000000
--- a/app/views/users/index.html.haml
+++ /dev/null
@@ -1,3 +0,0 @@
-%ul
-  - @users.each do |user|
-    %li= user.name
diff --git a/app/views/users/show.html.haml b/app/views/users/show.html.haml
new file mode 100644
index 0000000..5ce4ba4
--- /dev/null
+++ b/app/views/users/show.html.haml
@@ -0,0 +1,22 @@
+- page_title t('.page_title')
+
+
+
+%div.col-lg-6
+  - @user.errors.full_messages.each do |e|
+    = e
+
+  = form_for(:user, url: misc_user_path, method: :patch) do |f|
+    %div.form-group
+      = f.label :name
+      = f.text_field :name, class: "form-control", disabled: true
+    %div.form-group
+      = f.label :current_password
+      = f.password_field :current_password, class: "form-control"
+    %div.form-group
+      = f.label :password
+      = f.password_field :password, class: "form-control"
+    %div.form-group
+      = f.label :password_confirmation
+      = f.password_field :password_confirmation, class: "form-control"
+    = f.submit
diff --git a/config/locales/translation_ja.yml b/config/locales/translation_ja.yml
index 9bda968..0321964 100644
--- a/config/locales/translation_ja.yml
+++ b/config/locales/translation_ja.yml
@@ -17,7 +17,7 @@ ja:
     no_alert: なし
 
   plugins:
-    common: &common
+    common: &plugin_common
       <<: *terms
       name: プラグイン名
       status: 状態
@@ -30,23 +30,25 @@ ja:
       recommended: &recommended おすすめプラグイン
       updated: &updated 更新のあったプラグイン
     installed:
-      <<: *common
+      <<: *plugin_common
       page_title: *installed
     recommended:
-      <<: *common
+      <<: *plugin_common
       page_title: *recommended
     updated:
-      <<: *common
+      <<: *plugin_common
       page_title: *updated
 
-  miscs:
-    common: &common
-      <<: *terms
-    users:
-      <<: *common
+  users: &users
+    <<: *terms
+    show:
       page_title: ユーザー管理
+
+  miscs:
+    common: &misc_common
+      <<: *terms
     information:
-      <<: *common
+      <<: *misc_common
       env: 環境変数
       env_key: キー
       env_value: 値
@@ -60,6 +62,10 @@ ja:
     login_failed: ログインに失敗しました。
 
   activerecord:
+    errors:
+      messages:
+          wrong_password: が違います
+
     models:
       user: user  #g
 
@@ -68,3 +74,6 @@ ja:
         name: name  #g
         password_digest: password_digest  #g
         remember_token: remember_token  #g
+        current_password: 現在のパスワード
+        password: パスワード
+        password_confirmation: パスワード(確認)
diff --git a/config/routes.rb b/config/routes.rb
index 54d713c..d1137e9 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -12,7 +12,6 @@ Rails.application.routes.draw do
     end
   end
 
-  resources :users
   resource :sessions
 
   resources :plugins do
@@ -29,7 +28,6 @@ Rails.application.routes.draw do
 
   resource :misc do
     get "information"
-    resources :users do
-    end
+    resource :user, only: [:show, :edit, :update]
   end
 end
diff --git a/db/seeds.rb b/db/seeds.rb
index e4c11f2..36c9efa 100644
--- a/db/seeds.rb
+++ b/db/seeds.rb
@@ -6,4 +6,4 @@
 #   cities = City.create([{ name: 'Chicago' }, { name: 'Copenhagen' }])
 #   Mayor.create(name: 'Emanuel', city: cities.first)
 
-User.create(name: "admin", password: "changeme")
+User.create!(name: "admin", password: "changeme")
diff --git a/spec/controllers/users_controller_spec.rb b/spec/controllers/users_controller_spec.rb
deleted file mode 100644
index 142455c..0000000
--- a/spec/controllers/users_controller_spec.rb
+++ /dev/null
@@ -1,5 +0,0 @@
-require 'spec_helper'
-
-describe UsersController do
-
-end