To reduce a measurement error by increasing a chamber internal pressure.SOLUTION: A discharge device 10 includes: a discharge head which has a chamber 12 with a fluid supply port 16 and outlet port 18 opened, and has an opened discharge nozzle; discharge valve means 20 which opens/closes the discharge nozzle; outlet valve means 14 which can shut off a channel between the fluid supply port 16 and the outlet port 18; and an actuator 36 which is mounted on the discharge head and drives to open/close the valve means 20. In the high-pressure type discharge device 10, the discharge valve means 20 can perform valve closing operation by positioning in a high-pressure area in the chamber 12 and extruding. The outlet valve means 20 is formed coaxially with the discharge valve means 20, and performs valve opening operation to open valve seats 30, 32 placed between the fluid supply port 16 and the outlet port 18 with the valve closing operation of the discharge valve means 20.SELECTED DRAWING: Figure 1
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