PUMP DISPENSER

PROBLEM TO BE SOLVED: To contrive stabilizing discharge action by freely relatively movably providing a piston on a connecting shaft part fitted with two stoppers for regulating the relative movement range of the piston and using a slide valve mechanism in which when the piston is abutted on the stopper part a discharge path opening is closed in a discharge valve mechanism. SOLUTION: When pushing in an ejector head 5 against a spring 6 by hand, a discharge mechanism 8 is opened to discharge liquid in a pump body 2 sucked by opening a suction valve mechanism 7 in advance. At this time, since immediately after the head 5 is pushed in, a piston 3 is held by friction force between an outer cylindrical part 32 of the piston 3 and a cylindrical part 21 of the pump body 2, only a connecting shaft part 4 is moved downward and a first stopper part 41 leaves the lower end of an inner cylindrical part 31 of the piston 3 to open a discharge path opening 18a. And when by the following pushing-in a second stopper part 42 is engaged with the upper end of the piston, the piston 3 is pushed in, and the liquid in the pump body 2 is pressurized and discharged through a discharge nozzle 51.