To always perform self-check of the flowmeter state when inspecting the flow characteristic of an inspection body or existence of a leak by using the flowmeter.

This device is a flow rate inspection device for inspecting whether the flow characteristic of the inspection body is in a prescribed range or not by using the flowmeter, or a flow rate inspection device for inspecting existence of the leak of a container or the like by using the flowmeter. A flow rate resistance setter set with a prescribed flow rate is connected to the fluid discharge side of the flowmeter via a solenoid valve, and it is measured whether a measured value by the flowmeter shows the change of a value equivalent to the flow rate set in the flow rate resistance setter or not by opening/closing the solenoid valve, and when it is detected that the prescribed flow rate value change is measured, the flowmeter is determined to be normal.