PURPOSE: To provide a submerged pump which is constituted to extremely reduce the generation of vibration and noise and provide an increased life despite of a pump discharge rate of flow of the submerged pump.

CONSTITUTION: A guide 50a having a first space part 8 formed between the inner peripheral part thereof and the outer periphery of a ball is arranged between a stopper 4a in a delivery port 4 and a valve seat 50. The guide 50a is provided with a plurality of opening parts radially opened and arranged on a periphery and a second space part 9 is formed in the outer peripheral part of the guide and the inner periphery of the delivery port 4 and between the inner periphery of a delivery port 4 and the outer peripheral part of the guide 50a corresponding to the opening part. This constitution causes provision of a submerged pump which performs sharp reduction of the generation of vibration and noise and is provided with an increased life.