diff --git a/Gemfile b/Gemfile
index 91d17e8..b7b6f37 100644
--- a/Gemfile
+++ b/Gemfile
@@ -49,3 +49,8 @@ group :development, :test do
   gem 'spring'
 
 end
+
+group :test do
+  gem "shoulda-matchers", '2.6.0'
+  gem "minitest"
+end
diff --git a/Gemfile.lock b/Gemfile.lock
index c53d616..171a721 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -137,6 +137,8 @@ GEM
     sdoc (0.4.1)
       json (~> 1.7, >= 1.7.7)
       rdoc (~> 4.0)
+    shoulda-matchers (2.6.0)
+      activesupport (>= 3.0.0)
     skyblue-rails (0.0.0.2)
       railties (>= 3.1.0)
     spring (1.6.2)
@@ -172,11 +174,13 @@ DEPENDENCIES
   factory_girl_rails
   jbuilder (~> 2.0)
   jquery-rails
+  minitest
   pg
   rails (= 4.2.3)
   rspec-rails
   sass-rails (~> 5.0)
   sdoc (~> 0.4.0)
+  shoulda-matchers (= 2.6.0)
   skyblue-rails
   spring
   turbolinks
diff --git a/app/models/answer.rb b/app/models/answer.rb
new file mode 100644
index 0000000..0348afe
--- /dev/null
+++ b/app/models/answer.rb
@@ -0,0 +1,13 @@
+class Answer < ActiveRecord::Base
+  belongs_to :quiz
+
+  validates :answer_text, presence: true, length: { in: 1..30 }
+  validates :quiz_id, presence: true
+  validate :right_answer_is_only_one_by_one_quiz
+
+  def right_answer_is_only_one_by_one_quiz
+    if quiz.present? && right_or_wrong && quiz.answers.where(right_or_wrong: true) > 0
+      error.add(:right_answer_number, "1つの問題に対して正解は1つだけです")
+    end
+  end
+end
diff --git a/db/migrate/20160317000000_create_answers.rb b/db/migrate/20160317000000_create_answers.rb
new file mode 100644
index 0000000..ce5eca8
--- /dev/null
+++ b/db/migrate/20160317000000_create_answers.rb
@@ -0,0 +1,11 @@
+class CreateAnswers < ActiveRecord::Migration
+  def change
+    create_table :answers do |t|
+      t.string :answer_text, :null => false
+      t.boolean :right_or_wrong, :null => false
+      t.belongs_to :quiz, index: true, foreign_key: true
+
+      t.timestamps null: false
+    end
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index c8bc635..a97318c 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -11,11 +11,21 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20160311000000) do
+ActiveRecord::Schema.define(version: 20160317000000) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
 
+  create_table "answers", force: :cascade do |t|
+    t.string   "answer_text",    null: false
+    t.boolean  "right_or_wrong", null: false
+    t.integer  "quiz_id"
+    t.datetime "created_at",     null: false
+    t.datetime "updated_at",     null: false
+  end
+
+  add_index "answers", ["quiz_id"], name: "index_answers_on_quiz_id", using: :btree
+
   create_table "quiz_titles", force: :cascade do |t|
     t.string   "title",      null: false
     t.text     "url",        null: false
@@ -39,5 +49,6 @@
     t.datetime "updated_at", null: false
   end
 
+  add_foreign_key "answers", "quizzes"
   add_foreign_key "quizzes", "quiz_titles"
 end
diff --git a/spec/factories/answers.rb b/spec/factories/answers.rb
new file mode 100644
index 0000000..95737f9
--- /dev/null
+++ b/spec/factories/answers.rb
@@ -0,0 +1,7 @@
+FactoryGirl.define do
+  factory :answer do
+    answer_text "MyString"
+    right_or_wrong false
+    quiz_id nil
+  end
+end
diff --git a/spec/factories/quiz_titles.rb b/spec/factories/quiz_titles.rb
index a1bed9a..07497d4 100644
--- a/spec/factories/quiz_titles.rb
+++ b/spec/factories/quiz_titles.rb
@@ -1,6 +1,6 @@
 FactoryGirl.define do
   factory :quiz_title do
-    
+    title "MyString"
+    url "MyString"
   end
-
 end
diff --git a/spec/factories/quizzes.rb b/spec/factories/quizzes.rb
index 3714c2a..77afde0 100644
--- a/spec/factories/quizzes.rb
+++ b/spec/factories/quizzes.rb
@@ -1,7 +1,6 @@
 FactoryGirl.define do
   factory :quiz do
     quiz_statement "MyString"
-quiz_title nil
+    quiz_title nil
   end
-
 end
diff --git a/spec/models/answer_spec.rb b/spec/models/answer_spec.rb
new file mode 100644
index 0000000..440b5aa
--- /dev/null
+++ b/spec/models/answer_spec.rb
@@ -0,0 +1,25 @@
+require 'rails_helper'
+
+RSpec.describe Answer, type: :model do
+  before do
+    @quiz_title1 = FactoryGirl.create(:quiz_title, id: 1)
+    @quiz1       = FactoryGirl.create(:quiz, id: 1 , quiz_title_id: 1)
+    @answer1     = FactoryGirl.create(:answer, id: 1, quiz_id: 1, right_or_wrong: false)
+  end
+
+  subject { @answer1 }
+
+  describe "belongs_to quiz model" do
+    it { should belong_to(:quiz)}
+  end
+
+  describe "answer_text validate" do
+    it { should validate_presence_of(:answer_text) }
+    it { should ensure_length_of(:answer_text).is_at_least(1) }
+    it { should ensure_length_of(:answer_text).is_at_most(30) }
+  end
+
+  describe "answer_text validate" do
+    it { should validate_presence_of(:quiz_id) }
+  end
+end
diff --git a/spec/rails_helper.rb b/spec/rails_helper.rb
index 88ff2d0..fdd0b5f 100644
--- a/spec/rails_helper.rb
+++ b/spec/rails_helper.rb
@@ -5,6 +5,8 @@
 abort("The Rails environment is running in production mode!") if Rails.env.production?
 require 'spec_helper'
 require 'rspec/rails'
+require 'minitest/autorun'
+require 'shoulda/matchers'
 # Add additional requires below this line. Rails is not loaded until this point!
 
 # Requires supporting ruby files with custom matchers and macros, etc, in