Vehicle air conditioner

A vehicle air conditioner includes a thermoelectric conversion module (3), a first heat exchanger (5), a second heat exchanger (7), a first air-conditioning heat exchanger (9) , a second air-conditioning heat exchanger (11), a radiator (13), a first circuit (10) connecting the first heat exchanger and the first air-conditioning heat exchanger and a second circuit connecting the second heat exchanger, the second air-conditioning heat exchanger and the radiator. The second circuit includes a bypass passage (21) that bypasses the second air-conditioning heat exchanger and a first switching device (23) switching selectively between a first position where heat exchange medium flows through the bypass passage without allowing the heat exchange medium to flow through the second air-conditioning heat exchanger and a second position where the heat exchange medium flows through the second air-conditioning heat exchanger.