Abstract: A backlight module is provided and includes a back plate, a light guide plate, a light source, a frame, at least one first positioning member and at least one second positioning member. The back plate includes at least one first limiting hole. The light guide plate is disposed on the back plate. The light source is disposed on the back plate and located at one side of the light guide plate. The frame is disposed on the back plate and includes at least one second limiting hole. The first positioning member is inserted into the first limiting hole and the second limiting hole along a first direction and includes a positioning portion. The second positioning member is inserted into the frame along a second direction and fixed in the positioning portion. The first direction is different from the second direction.