An image sensor holder a frame, a first slidable holder, a second slidable holder, a first and a second driving arms, a first and a second driving device and at least two restoration devices. The first slidable holder is slidably mounted on the frame. The second slidable holder is slidably mounted on the first slidable holder. The first and second driving devices are separately mounted on the frame. The first driving arm rotatably is mounted on the frame and contacts the first slidable holder and the first driving device by both opposite ends thereof. The second driving arm slidably is mounted on the frame and contacts the second slidable holder and the second driving device respectively by both opposite ends thereof. The restoration devices are respectively positioned on the frame and the first holder for restoring the first and second holders back to original positions.