diff --git a/gerrit-gwtui/src/main/java/com/google/gerrit/client/ConfirmationCallback.java b/gerrit-gwtui/src/main/java/com/google/gerrit/client/ConfirmationCallback.java
new file mode 100644
index 0000000000..e3b7525ee2
--- /dev/null
+++ b/gerrit-gwtui/src/main/java/com/google/gerrit/client/ConfirmationCallback.java
@@ -0,0 +1,29 @@
+// Copyright (C) 2010 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package com.google.gerrit.client;
+
+/**
+ * Interface that a caller must implement to react on the result of a
+ * {@link ConfirmationDialog}.
+ */
+public interface ConfirmationCallback {
+
+  /**
+   * Called when the {@link ConfirmationDialog} is finished with OK.
+   * To be overwritten by subclasses.
+   */
+  public void onOk();
+
+}
diff --git a/gerrit-gwtui/src/main/java/com/google/gerrit/client/ConfirmationDialog.java b/gerrit-gwtui/src/main/java/com/google/gerrit/client/ConfirmationDialog.java
new file mode 100644
index 0000000000..c4cb770bce
--- /dev/null
+++ b/gerrit-gwtui/src/main/java/com/google/gerrit/client/ConfirmationDialog.java
@@ -0,0 +1,77 @@
+// Copyright (C) 2010 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package com.google.gerrit.client;
+
+import com.google.gwt.event.dom.client.ClickEvent;
+import com.google.gwt.event.dom.client.ClickHandler;
+import com.google.gwt.user.client.DOM;
+import com.google.gwt.user.client.ui.Button;
+import com.google.gwt.user.client.ui.FlowPanel;
+import com.google.gwt.user.client.ui.HTML;
+import com.google.gwtexpui.globalkey.client.GlobalKey;
+import com.google.gwtexpui.user.client.AutoCenterDialogBox;
+
+public class ConfirmationDialog extends AutoCenterDialogBox {
+
+
+  private Button cancelButton;
+
+  public ConfirmationDialog(final String dialogTitle, final HTML message,
+      final ConfirmationCallback callback) {
+    super(/* auto hide */false, /* modal */true);
+    setGlassEnabled(true);
+    setText(dialogTitle);
+
+    final FlowPanel buttons = new FlowPanel();
+
+    final Button okButton = new Button();
+    okButton.setText(Gerrit.C.confirmationDialogOk());
+    okButton.addClickHandler(new ClickHandler() {
+      @Override
+      public void onClick(ClickEvent event) {
+        hide();
+        callback.onOk();
+      }
+    });
+    buttons.add(okButton);
+
+    cancelButton = new Button();
+    DOM.setStyleAttribute(cancelButton.getElement(), "marginLeft", "300px");
+    cancelButton.setText(Gerrit.C.confirmationDialogCancel());
+    cancelButton.addClickHandler(new ClickHandler() {
+      @Override
+      public void onClick(ClickEvent event) {
+        hide();
+      }
+    });
+    buttons.add(cancelButton);
+
+    final FlowPanel center = new FlowPanel();
+    center.add(message);
+    center.add(buttons);
+    add(center);
+
+    message.setWidth("400px");
+
+    setWidget(center);
+  }
+
+  @Override
+  public void center() {
+    super.center();
+    GlobalKey.dialog(this);
+    cancelButton.setFocus(true);
+  }
+}
diff --git a/gerrit-gwtui/src/main/java/com/google/gerrit/client/GerritConstants.java b/gerrit-gwtui/src/main/java/com/google/gerrit/client/GerritConstants.java
index 567214acf3..357fc6fd44 100644
--- a/gerrit-gwtui/src/main/java/com/google/gerrit/client/GerritConstants.java
+++ b/gerrit-gwtui/src/main/java/com/google/gerrit/client/GerritConstants.java
@@ -32,6 +32,12 @@ public interface GerritConstants extends Constants {
   String errorDialogTitle();
   String errorDialogContinue();
 
+  String confirmationDialogOk();
+  String confirmationDialogCancel();
+
+  String branchDeletionDialogTitle();
+  String branchDeletionConfirmationMessage();
+
   String notSignedInTitle();
   String notSignedInBody();
 
diff --git a/gerrit-gwtui/src/main/java/com/google/gerrit/client/GerritConstants.properties b/gerrit-gwtui/src/main/java/com/google/gerrit/client/GerritConstants.properties
index e4b54be976..a341fa0117 100644
--- a/gerrit-gwtui/src/main/java/com/google/gerrit/client/GerritConstants.properties
+++ b/gerrit-gwtui/src/main/java/com/google/gerrit/client/GerritConstants.properties
@@ -13,6 +13,12 @@ loginTypeUnsupported = Sign in is not available.
 errorDialogTitle = Application Error
 errorDialogContinue = Continue
 
+confirmationDialogOk = OK
+confirmationDialogCancel = Cancel
+
+branchDeletionDialogTitle = Branch Deletion
+branchDeletionConfirmationMessage = Do you really want to delete the following branches?
+
 notSignedInTitle = Code Review - Session Expired
 notSignedInBody = <b>Session Expired</b>\
 <p>You are no longer signed in to Gerrit Code Review.</p>\
diff --git a/gerrit-gwtui/src/main/java/com/google/gerrit/client/admin/ProjectBranchesPanel.java b/gerrit-gwtui/src/main/java/com/google/gerrit/client/admin/ProjectBranchesPanel.java
index 090b000867..170c49171c 100644
--- a/gerrit-gwtui/src/main/java/com/google/gerrit/client/admin/ProjectBranchesPanel.java
+++ b/gerrit-gwtui/src/main/java/com/google/gerrit/client/admin/ProjectBranchesPanel.java
@@ -14,6 +14,8 @@
 
 package com.google.gerrit.client.admin;
 
+import com.google.gerrit.client.ConfirmationCallback;
+import com.google.gerrit.client.ConfirmationDialog;
 import com.google.gerrit.client.Gerrit;
 import com.google.gerrit.client.rpc.GerritCallback;
 import com.google.gerrit.client.ui.FancyFlexTable;
@@ -40,6 +42,7 @@ import com.google.gwt.user.client.ui.CheckBox;
 import com.google.gwt.user.client.ui.Composite;
 import com.google.gwt.user.client.ui.FlowPanel;
 import com.google.gwt.user.client.ui.Grid;
+import com.google.gwt.user.client.ui.HTML;
 import com.google.gwt.user.client.ui.Panel;
 import com.google.gwt.user.client.ui.FlexTable.FlexCellFormatter;
 import com.google.gwtexpui.globalkey.client.NpTextBox;
@@ -264,31 +267,47 @@ public class ProjectBranchesPanel extends Composite {
     }
 
     void deleteChecked() {
+      final StringBuilder message = new StringBuilder();
+      message.append("<b>").append(Gerrit.C.branchDeletionConfirmationMessage()).append("</b>");
+      message.append("<p>");
       final HashSet<Branch.NameKey> ids = new HashSet<Branch.NameKey>();
       for (int row = 1; row < table.getRowCount(); row++) {
         final Branch k = getRowItem(row);
         if (k != null && table.getWidget(row, 1) instanceof CheckBox
             && ((CheckBox) table.getWidget(row, 1)).getValue()) {
+          if (!ids.isEmpty()) {
+            message.append(", <br>");
+          }
+          message.append(k.getName());
           ids.add(k.getNameKey());
         }
       }
+      message.append("</p>");
       if (ids.isEmpty()) {
         return;
       }
 
-      Util.PROJECT_SVC.deleteBranch(projectName, ids,
-          new GerritCallback<Set<Branch.NameKey>>() {
-            public void onSuccess(final Set<Branch.NameKey> deleted) {
-              for (int row = 1; row < table.getRowCount();) {
-                final Branch k = getRowItem(row);
-                if (k != null && deleted.contains(k.getNameKey())) {
-                  table.removeRow(row);
-                } else {
-                  row++;
+      ConfirmationDialog confirmationDialog =
+          new ConfirmationDialog(Gerrit.C.branchDeletionDialogTitle(),
+              new HTML(message.toString()), new ConfirmationCallback() {
+        @Override
+        public void onOk() {
+          Util.PROJECT_SVC.deleteBranch(projectName, ids,
+              new GerritCallback<Set<Branch.NameKey>>() {
+                public void onSuccess(final Set<Branch.NameKey> deleted) {
+                  for (int row = 1; row < table.getRowCount();) {
+                    final Branch k = getRowItem(row);
+                    if (k != null && deleted.contains(k.getNameKey())) {
+                      table.removeRow(row);
+                    } else {
+                      row++;
+                    }
+                  }
                 }
-              }
-            }
-          });
+              });
+        }
+      });
+      confirmationDialog.center();
     }
 
     void display(final List<Branch> result) {