A mounting structure of a semiconductor package includes a semiconductor package, a chassis having a coupling boss protruding at a position corresponding to the coupling hole, a coupling member penetrating the coupling hole and coupled to the coupling boss, and an insulation member covering around the coupling hole of the reinforcing plate and making insulation contact with the coupling member and the coupling boss. The semiconductor package includes a film substrate for interfacing transmission of signals between a circuit board and a display panel, a semiconductor chip forming an electrical contact point with the film substrate, and a reinforcing plate to which the film substrate and the semiconductor chip are directly attached. The reinforcing plate has a coupling hole.