PURPOSE: To allow one pump unit to correspond to a pump for expanding a rubber boat, etc., and a pump for shower by integrally forming a gas pump used in expanding the rubber boat, etc., integrally with a liquid pump built in.

CONSTITUTION: A pump A for gas/liquid is equipped with a gas pump including a housing 13, motor 11, main shaft 14, vane wheel 16 for gas, and a rectifying casing 17, and further equipped with a liquid pump including a motor 11 used in common with the gas pump, main shaft 14, vane wheel 18 for liquid and a rectifying casing 19. The housing 13 has a handle part 13c at a part of the cylindrical outer peripheral surface having a connection part 13a used as suction port at one edge and a connection part 13b used as discharge port at the other edge. Further, as for the rectifying casing 19, a suction conduit 19d is installed in a demountable manner on a casing body 19c, and inserted into the connection part 13b, and the discharge port part 19b is projected, penetrating through the peripheral wall of the housing 13.