A series hybrid type straddled vehicle comprising: a frame; an electric power generation unit including an electric power generation engine and an electric power generator, the electric power generation engine being supported by the frame, the electric power generator being driven by output from the electric power generation engine to generate electric power; a front wheel rotatably supported by a front suspension supported by the frame, the front wheel being provided such that rotational power from the electric power generation engine is not mechanically transmitted to the front wheel; a rear wheel rotatably supported by a rear arm supported by the frame, the rear wheel being rotatably provided such that rotational power from the electric power generation engine is not mechanically transmitted to the rear wheel, the rear wheel having its front end positioned more rearward than the rear end of the front wheel with respect to a forward direction of the series hybrid type straddled vehicle; a motor unit supported by the frame, the front suspension, or the rear arm, the motor unit including a drive motor that is supplied with electric power generated by the electric power generator to drive at least either one of the front wheel or the rear wheel as a driving wheel; a control unit including an inverter that is configured to control electric power to be supplied from the electric power generator to the drive motor; an engine radiator that is configured to cool the electric power generation engine, the engine radiator being arranged at such a position that at least a part of the engine radiator can take impact of the relative wind, the position being more rearward than the front end of the front wheel with respect to the forward direction; and a non-supported electric motor radiator being arranged at such a position that at least a part of the non-supported electric motor radiator can take impact of relative wind when the series hybrid type straddled vehicle is in motion, the position being more rearward than the front end of the front wheel with respect to the forward direction, and characterized in that the non-supported electric motor radiator is configured to cool the inverter and/or the drive motor for driving the driving wheel without mechanically receiving rotational power from the electric power generation engine, the non-supported electric motor radiator having a larger cooling area than that of the engine radiator. a frame; an electric power generation unit including an electric power generation engine and an electric power generator, the electric power generation engine being supported by the frame, the electric power generator being driven by output from the electric power generation engine to generate electric power; a front wheel rotatably supported by a front suspension supported by the frame, the front wheel being provided such that rotational power from the electric power generation engine is not mechanically transmitted to the front wheel; a rear wheel rotatably supported by a rear arm supported by the frame, the rear wheel being rotatably provided such that rotational power from the electric power generation engine is not mechanically transmitted to the rear wheel, the rear wheel having its front end positioned more rearward than the rear end of the front wheel with respect to a forward direction of the series hybrid type straddled vehicle; a motor unit supported by the frame, the front suspension, or the rear arm, the motor unit including a drive motor that is supplied with electric power generated by the electric power generator to drive at least either one of the front wheel or the rear wheel as a driving wheel; a control unit including an inverter that is configured to control electric power to be supplied from the electric power generator to the drive motor; an engine radiator that is configured to cool the electric power generation engine, the engine radiator being arranged at such a position that at least a part of the engine radiator can take impact of the relative wind, the position being more rearward than the front end of the front wheel with respect to the forward direction; and a non-supported electric motor radiator being arranged at such a position that at least a part of the non-supported electric motor radiator can take impact of relative wind when the series hybrid type straddled vehicle is in motion, the position being more rearward than the front end of the front wheel with respect to the forward direction, and characterized in that the non-supported electric motor radiator is configured to cool the inverter and/or the drive motor for driving the driving wheel without mechanically receiving rotational power from the electric power generation engine, the non-supported electric motor radiator having a larger cooling area than that of the engine radiator.