A backlight module includes at least one light source, a light reflecting member, and a frame. The light reflecting member includes a center reflecting part, two first peripheral reflecting parts, two second peripheral reflecting parts, and two extension parts. The extension parts extend from either first upper bases of the first peripheral reflecting parts or second upper bases of the second peripheral reflecting parts, respectively. The center reflecting part, the first peripheral reflecting parts, the second peripheral reflecting parts and the extension parts are integrally formed as a one-piece, unitary member. The extension parts of the light reflecting member are disposed on either first side parts of the frame or second side parts of the frame, respectively.