INSPECTION APPARATUS AND INSPECTION METHOD

This inspection apparatus is provided with a pressure sensor (21), a reference orifice (22), a pump (20), and switching valves (30, 70). The reference orifice is provided to a first communication channel (27) for ensuring communication between a pressure passage (26) that is provided with the pressure sensor and a tank passage (25) that is in communication with a fuel tank (8). In the pump, eitherone of an intake port (201) and a discharge port (202) is in communication with an atmosphere passage (24) communicated with the atmosphere, the other is in communication with the pressure passage, and the pressure in the pressure passage can be reduced or increased. The switching valves operate in accordance with the pressure difference between the atmosphere passage and the pressure passage that varies due to the driving of the pump, and are capable of switching between a state in which a second communication channel (28) that opens into the pressure passage is blocked from communicating with passages other than th