A brushless DC motor driven by a PWM inverter, comprising: a stator including a stator iron core and a winding wound thereon and an insulator that insulates the stator iron core and is interposed between the stator iron core and the winding, the stator being integrally molded with an insulating resin; a rotor arranged to face the stator about a shaft; two bearings (15; 15a, 15b) rotatably supporting the shaft; a metal bracket fixing one of the bearings; and a drive circuit substrate having a drive circuit mounted thereon for driving the winding by an inverter using a pulse width modulation system, characterized in that: an iron core connection terminal is connected to the stator iron core, and the iron core connection terminal is inserted into the drive circuit substrate to electrically connect the stator iron core with a ground line, said ground line being a reference point of a zero potential arranged on the drive circuit substrate and connected to a ground wiring, wherein the iron core connection terminal is made of plated brass or phosphor bronze being a material having spring characteristics and can be welded and soldered, the iron core connection terminal is welded to an outer circumference portion of stator iron core, the iron core connection terminal has a fork-like shape on a one-hand side in the longitudinal direction and has a pin-like shape on the other-end side so that when the fork-like portion of the iron core connection terminal on the insulator side is inserted into the insulator such that the insulator and the outer circumference portion of stator iron core are sandwiched by the fork-like portion of the iron core connection terminal, the iron core connection terminal is fixed to the iron core, a hole is arranged on the insulator side of the fork-like portion of the iron core connection terminal, a convex portion is arranged at a position corresponding to the hole of the insulator to fix the iron core connection terminal to the stator iron core, and the iron core connection terminal is connected and fixed to land of the drive circuit substrate by soldering. a stator including a stator iron core and a winding wound thereon and an insulator that insulates the stator iron core and is interposed between the stator iron core and the winding, the stator being integrally molded with an insulating resin; a rotor arranged to face the stator about a shaft; two bearings (15; 15a, 15b) rotatably supporting the shaft; a metal bracket fixing one of the bearings; and a drive circuit substrate having a drive circuit mounted thereon for driving the winding by an inverter using a pulse width modulation system, characterized in that: an iron core connection terminal is connected to the stator iron core, and the iron core connection terminal is inserted into the drive circuit substrate to electrically connect the stator iron core with a ground line, said ground line being a reference point of a zero potential arranged on the drive circuit substrate and connected to a ground wiring, the iron core connection terminal is made of plated brass or phosphor bronze being a material having spring characteristics and can be welded and soldered, the iron core connection terminal is welded to an outer circumference portion of stator iron core, the iron core connection terminal has a fork-like shape on a one-hand side in the longitudinal direction and has a pin-like shape on the other-end side so that when the fork-like portion of the iron core connection terminal on the insulator side is inserted into the insulator such that the insulator and the outer circumference portion of stator iron core are sandwiched by the fork-like portion of the iron core connection terminal, the iron core connection terminal is fixed to the iron core, a hole is arranged on the insulator side of the fork-like portion of the iron core connection terminal, a convex portion is arranged at a position corresponding to the hole of the insulator to fix the iron core connection terminal to the stator iron core, and the iron core connection terminal is connected and fixed to land of the drive circuit substrate by soldering.