To extend service life of a pump by reducing excessive thrust load generating at the pump start-up, and to provide a vertical shaft multistage pump capable of securing a total thrust balance from start-up until normal operation.

The vertical shaft multistage pump comprises a thrust balancing mechanism for balancing an axial thrusting force during operation and a plurality of impellers. A double liner type impeller 30, comprising a balance hole 36 communicating a suction side with a back face side, a suction side liner part 32, and a back face side liner part 34, is used for the impeller of the multistage pump.