The present invention discloses a backlight module that includes a liquid crystal glass and a front frame. The front frame includes at most three successively-connected side frame members. The three side frame members are positionable on and hold down the liquid crystal glass. The present invention also discloses a backlight module, which includes a liquid crystal glass and a front frame, of which the front frame includes at most two side frame members that are opposite to each other. The two side frame members re positionable on and hold down the liquid crystal glass. The present invention also discloses a liquid crystal display device that uses the backlight module. The backlight module and the liquid crystal display device using the backlight module according to the present invention improve firmness of bonding between the liquid crystal glass and the front frame and lowers down cost of the backlight module.