The centrifugal pump manufacturing method of the present invention is a method of manufacturing a centrifugal pump 1 including a housing 2, a rotating body 3 rotatably accommodated in the housing 2, and a support mechanism 4 that supports the rotating body 3. The assembly process of assembling the bottom member 21 and the lid member 22, and irradiating the laser beam L near the boundary between the bottom member 21 and the lid member 22 in the assembled state, And a fusing step for fusing.本発明の遠心ポンプの製造方法は、ハウジング２と、ハウジング２内に回転可能に収納された回転体３と、回転体３を支持する支持機構４とを備える遠心ポンプ１を製造する方法であり、底部材２１と蓋部材２２とを組立てる組立工程と、組立状態で、底部材２１と蓋部材２２との境界部付近にレーザ光Ｌを照射することにより、底部材２１と蓋部材２２との融着を行う融着工程とを有している。
