In order to prevent a short circuit of top and bottom arms of a motor driving IC when noise is added to six control signals for controlling six switching elements, there is provided a semiconductor device (10, 10M, 10R, 10P) for driving a motor, being sealed with resin as one package and comprising: six switching elements (T1 - T6) for driving a three-phase motor (5); three output terminals (P9, P10, P11) for outputting voltages to the three-phase motor; at least one driving circuit (KT, KB) for driving the six switching elements; three control signal input terminals (P21, P22, P23); and a function (LG6, Fig. 2 , Fig. 4 ) of generating six control signals (VUT, VVT, VWT, VCTB, VVB, VWB) for control of the six switching elements based on three control signals (VU, VV, VW) inputted through the three control signal input terminals.