To provide a hydraulic power steering device capable of obtaining favorable steering feeling by eliminating effects on steering by various types of disturbance generated during the traveling of a vehicle without forcing an operator to operate a steering member.

A leaf spring 13 is interposed in a connection part of an output shaft 3 and a valve body 10, and a motor 6 is constituted by a rotor 62 integrally formed in an extending part 15 of a valve spool 11 and a stator 63 surrounding the rotor 62. Rotational force is applied to the valve body 10 by driving the motor 6 in accordance with a control command given by a steering control part 7 based on a detection result by a running condition sensor 8. and relative angle displacement is generated between the valve body 10 and the valve spool 11 within the elasticity of the leaf spring 13.