A backlight module includes a light blocking plate, a light guiding plate, a reflector, a circuit board, a flexible circuit board and a conductive connection element. The light blocking plate is disposed below a keyboard component and includes an emission zone. The light guiding plate is disposed below the light blocking plate and includes a hollowed-out portion. The reflector is disposed below the light guiding plate and includes a through hole. The through hole corresponds in position to the hollowed-out portion. The circuit board is disposed below the reflector. A light-emitting component is disposed on the circuit board. The flexible circuit board is disposed below the reflector which separates the flexible circuit board and the light guiding plate. The conductive connection element is disposed on the circuit board, penetratingly disposed at the hollowed-out portion and the through hole, and connected to the circuit board and the flexible circuit board.