A steering system of a saddle-ride type vehicle, comprising: a front fork that includes a steering shaft at the upper end and supports a front wheel at the lower end; a steering arm that is attached to the steering shaft; a steering force transmit member that 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, wherein the steering system is further provided with: an assist motor that generates a steering assist force that assists a steering force transmitted to the steering shaft; characterised by that the steering system is further provided with: a steering assist force transmit member that is turnably supported by the steering stem; and an assist steering system link that joins the steering arm and the steering assist force transmit member, and wherein engage sections (38d, 72d) are arranged between the steering force transmit member and the steering assist force transmit member, the engage sections (38d, 72d) allowing the steering force transmit member and the 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. a front fork that includes a steering shaft at the upper end and supports a front wheel at the lower end; a steering arm that is attached to the steering shaft; a steering force transmit member that 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, wherein the steering system is further provided with: an assist motor that generates a steering assist force that assists a steering force transmitted to the steering shaft; characterised by that the steering system is further provided with: a steering assist force transmit member that is turnably supported by the steering stem; and an assist steering system link that joins the steering arm and the steering assist force transmit member, and wherein engage sections (38d, 72d) are arranged between the steering force transmit member and the steering assist force transmit member, the engage sections (38d, 72d) allowing the steering force transmit member and the 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. an assist motor that generates a steering assist force that assists a steering force transmitted to the steering shaft; characterised by that the steering system is further provided with: a steering assist force transmit member that is turnably supported by the steering stem; and a steering assist force transmit member that is turnably supported by the steering stem; and an assist steering system link that joins the steering arm and the steering assist force transmit member, and wherein engage sections (38d, 72d) are arranged between the steering force transmit member and the steering assist force transmit member, the engage sections (38d, 72d) allowing the steering force transmit member and the 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.