A renewable energy power generating apparatus,comprising: at least one blade; a hub to which the at least one blade is mounted; a hydraulic pump including a rotor part fixed to the hub and configured to rotate with the hub, a pressurized-oil generation mechanism configured to produce pressurized oil by rotation of the rotor part, a stator part which forms a pump interior space for accommodating the pressurized-oil generation mechanism with the rotor part, and at least one pump bearing disposed between the rotor part and the stator part; a nacelle for housing at least the hydraulic pump; a tower for supporting the nacelle; a yaw rotation bearing for rotatably supporting a nacelle base plate of the nacelle on the tower; at least one support part for supporting the stator part of the hydraulic pump on the nacelle base plate of the nacelle; at least one hydraulic motor configured to be driven by the pressurized oil produced by the pressurized-oil generation mechanism; and a generator configured to be driven by the at least one hydraulic motor, wherein the rotor part is supported to the nacelle base plate exclusively by the at least one pump bearing so as to be rotatable, wherein the at least one support part is configured to support the stator part on the nacelle base plate so that the hydraulic pump is disposed between the hub and a center axis of the yaw rotation bearing, and wherein the at least one support part includes an access passage for connecting a first space and a second space, the first space being disposed in the nacelle and accommodating the hydraulic pump, and the second space being disposed in the nacelle and at an opposite side of the at least one support part from the first space, the renewable energy power generating apparatus being characterized in that: the stator part is disposed radially inside the rotor part, the at least one support part is a tubular member including a bend portion which extends from the nacelle base plate toward the hub, the bend portion has a distal end connected to the end of the stator part which is remote from the hub, and the tubular member includes an opening disposed on an outer side of a curved cross-sectional shape of the bend portion, the opening serving as the access passage. at least one blade; a hub to which the at least one blade is mounted; a hydraulic pump including a rotor part fixed to the hub and configured to rotate with the hub, a pressurized-oil generation mechanism configured to produce pressurized oil by rotation of the rotor part, a stator part which forms a pump interior space for accommodating the pressurized-oil generation mechanism with the rotor part, and at least one pump bearing disposed between the rotor part and the stator part; a nacelle for housing at least the hydraulic pump; a tower for supporting the nacelle; a yaw rotation bearing for rotatably supporting a nacelle base plate of the nacelle on the tower; at least one support part for supporting the stator part of the hydraulic pump on the nacelle base plate of the nacelle; at least one hydraulic motor configured to be driven by the pressurized oil produced by the pressurized-oil generation mechanism; and a generator configured to be driven by the at least one hydraulic motor, wherein the rotor part is supported to the nacelle base plate exclusively by the at least one pump bearing so as to be rotatable, wherein the at least one support part is configured to support the stator part on the nacelle base plate so that the hydraulic pump is disposed between the hub and a center axis of the yaw rotation bearing, and wherein the at least one support part includes an access passage for connecting a first space and a second space, the first space being disposed in the nacelle and accommodating the hydraulic pump, and the second space being disposed in the nacelle and at an opposite side of the at least one support part from the first space, the renewable energy power generating apparatus being characterized in that: the stator part is disposed radially inside the rotor part, the at least one support part is a tubular member including a bend portion which extends from the nacelle base plate toward the hub, the bend portion has a distal end connected to the end of the stator part which is remote from the hub, and the tubular member includes an opening disposed on an outer side of a curved cross-sectional shape of the bend portion, the opening serving as the access passage. the stator part is disposed radially inside the rotor part, the at least one support part is a tubular member including a bend portion which extends from the nacelle base plate toward the hub, the bend portion has a distal end connected to the end of the stator part which is remote from the hub, and the tubular member includes an opening disposed on an outer side of a curved cross-sectional shape of the bend portion, the opening serving as the access passage.