A straddled vehicle comprising: a vehicle body frame; an internal combustion engine supported by the vehicle body frame; a rear arm supported on the vehicle body frame to be swingable by a pivot shaft; a rear wheel supported by the rear arm, the rear wheel being configured to be driven by the internal combustion engine; and a rear suspension unit including a first support supported by the vehicle body frame and a second support supported by the rear arm, wherein the internal combustion engine includes a crankcase, a cylinder body extending forward in a vehicle front-rear direction and upward in a vehicle up-down direction from the crankcase, a cylinder head extending forward in the vehicle front-rear direction and upward in the vehicle up-down direction from the cylinder body, a crankshaft disposed inside the crankcase, and a transmission disposed inside the crankcase and at the rear of the crankshaft in the vehicle front-rear direction, the rear suspension unit includes a damper, a coil spring disposed around at least a part of the damper, a reservoir in which a gas chamber is formed, and an actuator configured to receive an electrical signal and adjust a damping force of the damper, the reservoir and the actuator are disposed at the outside of the damper and integrally provided to the damper, the reservoir is disposed at the rear of an upper end of the cylinder head in the vehicle front-rear direction, above the transmission in the vehicle up-down direction and preferably overlaps the transmission in a vehicle plan view, and at the front of a rear end of the crankcase in the vehicle front-rear direction, and the rear suspension unit is located below the upper end of the cylinder head in the vehicle up-down direction, characterized in that in a vehicle side view, an angle (θ) formed by a center line of the rear suspension unit and a horizontal line is 45 degrees or less. a vehicle body frame; an internal combustion engine supported by the vehicle body frame; a rear arm supported on the vehicle body frame to be swingable by a pivot shaft; a rear wheel supported by the rear arm, the rear wheel being configured to be driven by the internal combustion engine; and a rear suspension unit including a first support supported by the vehicle body frame and a second support supported by the rear arm, wherein the internal combustion engine includes a crankcase, a cylinder body extending forward in a vehicle front-rear direction and upward in a vehicle up-down direction from the crankcase, a cylinder head extending forward in the vehicle front-rear direction and upward in the vehicle up-down direction from the cylinder body, a crankshaft disposed inside the crankcase, and a transmission disposed inside the crankcase and at the rear of the crankshaft in the vehicle front-rear direction, the rear suspension unit includes a damper, a coil spring disposed around at least a part of the damper, a reservoir in which a gas chamber is formed, and an actuator configured to receive an electrical signal and adjust a damping force of the damper, the reservoir and the actuator are disposed at the outside of the damper and integrally provided to the damper, the reservoir is disposed at the rear of an upper end of the cylinder head in the vehicle front-rear direction, above the transmission in the vehicle up-down direction and preferably overlaps the transmission in a vehicle plan view, and at the front of a rear end of the crankcase in the vehicle front-rear direction, and the rear suspension unit is located below the upper end of the cylinder head in the vehicle up-down direction, characterized in that in a vehicle side view, an angle (θ) formed by a center line of the rear suspension unit and a horizontal line is 45 degrees or less.