An electronic device includes a case, a plate, and a detachable member. The case has a first receiving area, a second receiving area, and a movable latch. The first receiving area is adjacent to the second receiving area. The movable latch moves back and forth between the first receiving area and the second receiving area. The detachable member is assembled to the first receiving area. The plate is assembled to the second receiving area. When the movable latch is located in the first receiving area, the movable latch locks the detachable member to the case. When the movable latch moves to the second receiving area, the movable latch is locked to the plate.