diff --git a/app/src/main/kotlin/jackall/moncalc/utils/RxBus.kt b/app/src/main/kotlin/jackall/moncalc/utils/RxBus.kt
new file mode 100644
index 0000000..8dceef1
--- /dev/null
+++ b/app/src/main/kotlin/jackall/moncalc/utils/RxBus.kt
@@ -0,0 +1,48 @@
+package jackall.moncalc.utils
+
+import io.reactivex.Observable
+import io.reactivex.disposables.CompositeDisposable
+import io.reactivex.disposables.Disposable
+import io.reactivex.subjects.PublishSubject
+
+/**
+ * Created by matsumoto_k on 2017/11/05.
+ */
+object RxBus {
+
+    private val subscriptionsMap: HashMap<Any, CompositeDisposable> by lazy {
+        HashMap<Any, CompositeDisposable>()
+    }
+
+    val bus = (PublishSubject.create<Any>()).toSerialized()
+
+    fun send(event: Any) {
+        bus.onNext(event)
+    }
+
+    inline fun <reified eventType : Any> observe(): Observable<eventType> {
+        return bus.ofType(eventType::class.java)
+    }
+
+    fun unregister(subscriber: Any) {
+        val compositeSubscription = subscriptionsMap[subscriber]
+        if (compositeSubscription == null) {
+        } else {
+            compositeSubscription.clear()
+            subscriptionsMap.remove(subscriber)
+        }
+    }
+
+    internal fun register(subscriber: Any, subscription: Disposable) {
+        var compositeDisposable = subscriptionsMap[subscriber]
+        if (compositeDisposable == null) {
+            compositeDisposable = CompositeDisposable()
+        }
+        compositeDisposable.add(subscription)
+        subscriptionsMap[subscriber] = compositeDisposable
+    }
+}
+
+fun Disposable.registerInBus(subscriber: Any) {
+    RxBus.register(subscriber, this)
+}
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