To provide a drainage pump, in which the number of parts can be reduced, while waterproofness of a motor is secured.

A drainage pump includes a pump body 10 having a suction port 12, a delivery port 16 and a pump chamber 14 communicating with them, a rotary blade 20 arranged in the pump chamber, a motor 100 for rotating the rotary blade, and a motor receiving member 50 fixed to an upper part of the pump body and supporting the motor. The motor is a mold motor. The motor receiving member has a cover part 52 for covering an opening part of the pump body, a motor receiving part 60 integrally molded with the cover part, and a plurality of installation legs 70 integrally molded in the motor receiving part to be installed in an indoor unit.