A hydroelectric power generation device is provided to improve the efficiency by arranging series of plates along the longitudinal direction of an endless track placed at an angle of 10 to 45 degrees against the flow of water in order to transmit kinetic energy of flowing water transmitted to the next plate without being interrupted by the preceding plate. A hydraulic power generation device has an endless track(1) mounted on a structural body on water, carriages(2) installed to the endless track, connectors(3) linking one carriage to another carriage, and plates(4) installed to carriages. The endless track is placed at an angle of 10 to 45 degree against the direction of water flow.
