diff --git a/page/client.ts b/page/client.ts
index 0cdc19d..6302742 100644
--- a/page/client.ts
+++ b/page/client.ts
@@ -79,3 +79,8 @@ export function setPreedit(text: string, index: number) {
 export function commit(text: string) {
   changeInput(text, '', 0)
 }
+
+export function resetPreedit() {
+  preedit = ''
+  preeditIndex = 0
+}
diff --git a/page/focus.ts b/page/focus.ts
index 8f53fd1..44de218 100644
--- a/page/focus.ts
+++ b/page/focus.ts
@@ -1,4 +1,5 @@
 import Module from './module'
+import { resetPreedit } from './client'
 
 type Input = HTMLInputElement | HTMLTextAreaElement
 
@@ -28,6 +29,7 @@ export function blur() {
   }
   input = null
   Module.ccall('focus_out', 'void', [], [])
+  resetPreedit()
 }
 
 export function getInputElement(): Input | null {