Abstract: [Problem] To provide by the present invention a pressure-accumulation dispenser that can be given a pressure-accumulation function with a simple structure. [Means for Solving Problems] A pressure-accumulation dispenser pressurizes and injects liquid in a cylinder 11 from a nozzle portion 21 to the outside by sliding a piston portion 23 in the cylinder 11 up and down with rotation of a trigger includes a pressure-accumulation giving valve in the piston portion 23. The pressure-accumulation giving valve is formed of a piston valve 51, a spring body 52, and a piston cover 53, or the pressure-accumulation giving valve is formed of an insertion valve seat 54, a piston valve 51, a spring body 52, and a piston cover 53.