To automatically inspect whether or not an opening/closing device for opening/closing a passage for passing air conditioned air can be normally operated from a first position to a second position of both ends of an operation range, and to achieve a highly accurate inspection of the operation of the opening/closing device, regardless of skillfulness of an operator.

This inspection device is provided with the opening/closing device for opening/closing the passage for passing air conditioned air and a driving means for driving the opening/closing device. The inspection device is provided with an air conditioning system inspection means capable of executing an air conditioning system inspection process at the time of manufacturing the air conditioning system or at a maintenance time after mounting the air conditioning system on a vehicle, and an opening/closing device inspection means for executing an opening/closing device inspection process when power is supplied the next time when an execution instruction of the opening/closing device inspection process for inspecting whether or not the opening/closing device can be moved from the first position to the second position of both the ends of the operation range is set in the air conditioning system inspection process executed by the air conditioning system inspection means.