Patent ID: 7370724

Claim:
A motor-driven steering assist apparatus interposed between a steering wheel and a wheel side steering member, and assisting a steering force which a driver applies to the steering wheel on the basis of a generating torque of an electric motor, comprising: a single unit body covered by a housing having an input shaft to which the steering wheel is connected, an output shaft to which the wheel side steering member is connected, a torque sensor which is provided between the input shaft and the output shaft, an electric motor which is driven in correspondence to a detected torque of the torque sensor, and a gear train which transmits a rotation of the electric motor to the output shaft built-in, an elastic member is interposed between an attaching portion provided in the housing and a vehicle body side attaching stay, wherein the elastic member is provided in both sides of the attaching portion provided in the housing, and the attaching portion provided in the housing is pinched between forked support portions of the vehicle body side attaching stay via the elastic member.