A stroke simulator comprising: an input shaft that performs a stroke as a result of an input being applied thereto; a simulator actuation piston that performs a stroke because of the stroke of the input shaft; a simulator actuation hydraulic chamber in which simulator actuation hydraulic pressure that applies a reaction force based on the stroke of the input shaft to the simulator actuation piston is generated by the stroke of the simulator actuation piston; and a hydraulic actuation control system that controls the simulator actuation hydraulic pressure on the basis of the stroke of the input shaft by controlling the supply and discharge of hydraulic fluid to and from the simulator actuation hydraulic chamber, wherein the hydraulic actuation control system has a first flow rate control valve that supplies the hydraulic fluid to the simulator actuation hydraulic chamber and a second flow rate control valve that discharges the hydraulic fluid in the simulator actuation hydraulic chamber, wherein the valve lift of the first flow rate control valve is controlled on the basis of the stroke of the input shaft, and the valve lift of the second flow rate control valve is controlled on the basis of the stroke of the input shaft, wherein when the input shaft has performed a stroke as a result of the input being applied thereto, the first flow rate control valve is closed and the second flow rate control valve is opened, characterized in that the valve lift of the second flow rate control valve is set to an extremely small first valve lift when the stroke of the input shaft has become a first stroke, is set to a second valve lift larger than the first valve lift when the hydraulic pressure inside the simulator actuation hydraulic chamber has become a predetermined hydraulic pressure determined beforehand, and is set to become smaller from the second valve lift together with a further increase in the stroke of the input shaft from when the stroke of the input shaft has become a second stroke larger than the first stroke. an input shaft that performs a stroke as a result of an input being applied thereto; a simulator actuation piston that performs a stroke because of the stroke of the input shaft; a simulator actuation hydraulic chamber in which simulator actuation hydraulic pressure that applies a reaction force based on the stroke of the input shaft to the simulator actuation piston is generated by the stroke of the simulator actuation piston; and a hydraulic actuation control system that controls the simulator actuation hydraulic pressure on the basis of the stroke of the input shaft by controlling the supply and discharge of hydraulic fluid to and from the simulator actuation hydraulic chamber, wherein the hydraulic actuation control system has a first flow rate control valve that supplies the hydraulic fluid to the simulator actuation hydraulic chamber and a second flow rate control valve that discharges the hydraulic fluid in the simulator actuation hydraulic chamber, wherein the valve lift of the first flow rate control valve is controlled on the basis of the stroke of the input shaft, and the valve lift of the second flow rate control valve is controlled on the basis of the stroke of the input shaft, wherein when the input shaft has performed a stroke as a result of the input being applied thereto, the first flow rate control valve is closed and the second flow rate control valve is opened, characterized in that the valve lift of the second flow rate control valve is set to an extremely small first valve lift when the stroke of the input shaft has become a first stroke, is set to a second valve lift larger than the first valve lift when the hydraulic pressure inside the simulator actuation hydraulic chamber has become a predetermined hydraulic pressure determined beforehand, and is set to become smaller from the second valve lift together with a further increase in the stroke of the input shaft from when the stroke of the input shaft has become a second stroke larger than the first stroke.