The present invention provides a backlight module and a lamp socket structure thereof. The lamp socket uses a conductive sleeve to receive and electrically connect to a lead wire of a backlight lamp, and the conductive sleeve is extended downward to form two elastic plug plates for connecting to two elastic receptacle plates of a conductive receptacle. Then, the conductive receptacle is further connected to an insulation base. The design of the present invention can efficiently avoid the lamp breakage problem due to vibrations of lead wires, so as to surely increase the stability of mounting lamps and the reliability of electrically connecting to the lamps.