An electric power steering apparatus comprising: a steering column having inserted therein a steering shaft to which steering torque is transmitted; a reduction gear box coupled to the steering column; and an electric motor that transmits a steering assisting force to the steering shaft via a reduction mechanism in the reduction gear box, wherein the electric motor and a control unit including a control board mounted with a control circuit that controls driving of the electric motor are provided side by side in the reduction gear box, and a connection terminal (5c, 5d) of the electric motor is electrically connected to the control unit directly, characterized in that the connection terminal (5c, 5d) comes into surface contact with a terminal block of the control unit to be electrically connected to the terminal block, an external connection terminal (15c to 15f) from a torque sensor installed in the reduction gear box is electrically connected to the control unit directly to be directly inserted into through holes (25a to 25d) of the control board, the reduction gear box includes: a worm housing unit 12 for housing a worm coupled to an output shaft of the electric motor; a worm-wheel housing unit for housing a worm wheel coupled to the steering shaft; and a torque-sensor housing unit coupled to the worm-wheel housing unit, housing a torque sensor, and coupled to the steering column, a control-unit mounting section for mounting the control unit is formed in an outer peripheral portion of the worm housing unit, the worm-wheel housing unit, and the torque-sensor housing unit, and a distal end of the torque-sensor housing unit is formed as a contraction stopper for the steering column at the time of collapse, and a contraction stopper side end surface position of the control unit mounted on the control-unit mounting section is set further on a worm-wheel housing unit side than the contraction stopper. a steering column having inserted therein a steering shaft to which steering torque is transmitted; a reduction gear box coupled to the steering column; and an electric motor that transmits a steering assisting force to the steering shaft via a reduction mechanism in the reduction gear box, wherein the electric motor and a control unit including a control board mounted with a control circuit that controls driving of the electric motor are provided side by side in the reduction gear box, and a connection terminal (5c, 5d) of the electric motor is electrically connected to the control unit directly, the connection terminal (5c, 5d) comes into surface contact with a terminal block of the control unit to be electrically connected to the terminal block, an external connection terminal (15c to 15f) from a torque sensor installed in the reduction gear box is electrically connected to the control unit directly to be directly inserted into through holes (25a to 25d) of the control board, the reduction gear box includes: a worm housing unit 12 for housing a worm coupled to an output shaft of the electric motor; a worm-wheel housing unit for housing a worm wheel coupled to the steering shaft; and a torque-sensor housing unit coupled to the worm-wheel housing unit, housing a torque sensor, and coupled to the steering column, a control-unit mounting section for mounting the control unit is formed in an outer peripheral portion of the worm housing unit, the worm-wheel housing unit, and the torque-sensor housing unit, and a distal end of the torque-sensor housing unit is formed as a contraction stopper for the steering column at the time of collapse, and a contraction stopper side end surface position of the control unit mounted on the control-unit mounting section is set further on a worm-wheel housing unit side than the contraction stopper.