Centrifugal compressor impeller

This centrifugal compressor impeller has: blades (3); and a disc (2) which has the blades (3) provided on the front surface (2c) thereof and which includes a shaft section (2d) provided on the rear surface (2e) of the disc (2) so as to protrude in the direction opposite to the direction of protrusion of the blades (3). A bearing surface (10) for a fluid bearing, the bearing surface (10) being provided on the rear surface (2e) of the disc (2), is provided at a portion farther from the center of rotation of the centrifugal compressor impeller than the bottom surface or the inner wall surface of the shaft section (2d). 本发明的离心压缩机叶轮具有叶片（3）和盘（2），前述盘（2）在正面（2c）上设置有叶片（3），在背面（2e）上包括向与叶片（3）相反的方向突出的轴部（2d），设置于盘（2）的背面（2e）的流体轴承的轴承面（10）被设置于与轴部（2d）的底面或者内壁面相比距离心压缩机叶轮的旋转中心远的部位上。