diff --git a/app/src/main/java/com/example/sprout/refactor/model/BaseModel.java b/app/src/main/java/com/example/sprout/refactor/model/BaseModel.java
new file mode 100644
index 0000000..435c1ce
--- /dev/null
+++ b/app/src/main/java/com/example/sprout/refactor/model/BaseModel.java
@@ -0,0 +1,42 @@
+package com.example.sprout.refactor.model;
+
+import io.reactivex.Observable;
+import io.reactivex.subjects.BehaviorSubject;
+import io.reactivex.subjects.Subject;
+
+/**
+ * Entityを管理するクラスの基底クラス
+ * <T>:Entity
+ * <Params>:CRUDに必要なParams
+ * Created by matsumoto_k on 2017/12/19.
+ */
+public abstract class BaseModel<T, Params> {
+    protected final Subject<T> entitySubject = BehaviorSubject.<T>create().toSerialized();
+    protected final Subject<Throwable> errorSubject = BehaviorSubject.<Throwable>create().toSerialized();
+
+    public abstract void create(Params params);
+
+    public abstract void read(Params params);
+
+    public abstract void update(Params params);
+
+    public abstract void delete(Params params);
+
+    /**
+     * Entityを保持するSubjectをObservableに変換して返す
+     *
+     * @return Observable<T>
+     */
+    public Observable<T> getEntityObservable() {
+        return entitySubject.hide();
+    }
+
+    /**
+     * Errorを保持するSubjectをObservbaleに変換して返す
+     *
+     * @return
+     */
+    public Observable<Throwable> getErrorObservable() {
+        return errorSubject.hide();
+    }
+}