A
fluid pressure-feeding device includes: a
balloon pump of a bag shape that is elastically expandable, contractible and deformable, and defines a
pump chamber inside; and a flow path unit that includes at least a portion of a flow path communicating with the
pump chamber. The
balloon pump and the flow path unit are integrally arranged. The flow path includes a supply path that supplies a fluid to the
pump chamber, and a
discharge path that discharges the fluid from the pump chamber. The
discharge path has a greater pressure loss than the supply path.