To provide a pump mounting stand stably leveling a portable power pump even on an inclined ground surface and quickly adjustable of a height.

The pump mounting stand is constructed of a mounting plate for placement of the portable power pump on a surface, a plurality of legs not aligned and supporting the plate and a leg height adjusting mechanism for separately adjusting heights of the respective legs. The leg height adjusting mechanism is of a hydraulic type, a pneumatic type, a stair type or the like and can quickly level the mounting plate with light operation even in a state that the pump is mounted on the mounting stand.