A steering system of a saddle-ride type vehicle includes a front fork that includes a steering shaft at the upper end and supports a front wheel at the lower end. A steering arm is attached to the steering shaft, a steering force transmit member is turnably supported by a steering stem that is arranged in a body frame, and a steering system link that joins the steering arm and the steering force transmit member. Engage sections are arranged between the steering force transmit member and the steering assist force transmit member. The engage sections allow the steering force transmit member and a steering assist force transmit member to be engaged with each other so that the steering assist force transmit member is turned around the steering stem accompanying turning of the steering force transmit member.