diff --git a/src/ts/@overflow/sensor/react/components/item_tree.tsx b/src/ts/@overflow/sensor/react/components/item_tree.tsx
index 5f716e2..e0a4494 100644
--- a/src/ts/@overflow/sensor/react/components/item_tree.tsx
+++ b/src/ts/@overflow/sensor/react/components/item_tree.tsx
@@ -17,7 +17,7 @@ export type Props = StateProps & DispatchProps;
 
 export interface State {
   dropState: Map<string, boolean>;
-  checkBoxState: Map<string, boolean>;
+  // checkBoxState: Map<string, boolean>;
   checkBoxChildrenState: Map<string, Map<string, boolean>>;
 }
 
@@ -35,7 +35,7 @@ export class ItemTree extends React.Component<Props, State> {
 
     this.state = {
       dropState: new Map(),
-      checkBoxState: new Map(),
+      // checkBoxState: new Map(),
       checkBoxChildrenState: new Map(),
     };
 
@@ -70,10 +70,14 @@ export class ItemTree extends React.Component<Props, State> {
     });
   }
 
-  private onCheckBox = (key: string, checkProps: CheckboxProps, data: ItemTreeObj) => {
-    this.state.checkBoxState[key] = checkProps.checked;
+  private onCheckBox = (pKey: string, key: string, checkProps: CheckboxProps, data: ItemTreeObj) => {
+    // this.state.checkBoxState[key] = checkProps.checked;
     let newCheckBoxChildrenState: Map<string, Map<string, boolean>> = _.clone(this.state.checkBoxChildrenState);
 
+    if(newCheckBoxChildrenState.get(pKey) === undefined) {
+      newCheckBoxChildrenState.set(pKey, new Map());
+    }
+    newCheckBoxChildrenState.get(pKey).set(key, checkProps.checked);
 
     this.reverseChildrenCheck(data.children, key, checkProps, newCheckBoxChildrenState);
 
@@ -97,20 +101,20 @@ export class ItemTree extends React.Component<Props, State> {
 
     let resBool: boolean = false;
 
-    if (this.state.checkBoxState[key]) {
-      resBool = true;
+    // if (this.state.checkBoxState[key]) {
+    //   resBool = true;
+    // }
+
+    // if (pKey !== '') {
+
+    let childrenState: Map<string, boolean> = this.state.checkBoxChildrenState.get(pKey);
+
+    if (childrenState !== undefined) {
+      let b: boolean = childrenState.get(key);
+      resBool = b;
     }
 
-    if (pKey !== '') {
-
-      let childrenState: Map<string, boolean> = this.state.checkBoxChildrenState.get(pKey);
-
-      if (childrenState !== undefined) {
-        let b: boolean = childrenState.get(key);
-        resBool = b;
-      }
-
-    }
+    // }
     return resBool;
   }
 
@@ -123,7 +127,7 @@ export class ItemTree extends React.Component<Props, State> {
 
     let elems: JSX.Element[];
 
-    elems = this.itemRender(this.props.ItemTreeList, '');
+    elems = this.itemRender(this.props.ItemTreeList, 'r');
 
     return elems;
   }
@@ -158,7 +162,7 @@ export class ItemTree extends React.Component<Props, State> {
                 {item.isCheckBox === false ? item.label :
                   <Checkbox label={item.label} checked={this.checkCheckBox(nkeyStr, pKeyStr) ? true : false} onChange={
                     (event: React.FormEvent<HTMLInputElement>, checkProps: CheckboxProps) => {
-                      this.onCheckBox(nkeyStr, checkProps, item);
+                      this.onCheckBox(pKeyStr, nkeyStr, checkProps, item);
                     }} />}
               </List.Header>
               <List.Description style={{ marginLeft: '26px' }}></List.Description>