To provide a discharger having good operability in which a load at start of discharge operation is reduced.SOLUTION: The present invention pertains to a discharger 1 or 100 that is attached to a mouth portion 2a of a container main body 2 for storing contents 3, and includes: a cylinder portion 13; a piston portion 15 for partitioning to form a pressure chamber 14 in between with the cylinder portion 13; a biasing member 16 for biasing the piston portion 15; an operation member 17 or 101 for moving the piston portion 15; a discharge nozzle 18 communicating with an outflow port 22 opened at an upper portion of the pressure chamber 14; a first valve body 50 provided at an inflow port 21; a second valve body 51 provided at the outflow port 22; and an air reservoir 60 where air is stored inside, provided so as to be...

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