An inspection device according to an embodiment can conduct high temperature inspection and low temperature inspection on an object to be inspected. The inspection device includes an inspection chamber in which inspection is conducted on the object; a dry air supply section that is connected to the inspection chamber via a first valve and that is configured to supply dry air into the inspection chamber; a dew point meter that is connected to the inspection chamber via a second valve and that is configured to measure a dew point in the inspection chamber; and a bypass pipe connecting the dry air supply section and the dew point meter via a third valve.