AIR CONDITIONER

An air conditioner according to the present disclosure includes indoor heat exchanger in indoor unit, an outdoor heat exchanger in an outdoor unit, pipe connector connecting a refrigerant pipe attached to the indoor heat exchanger to a refrigerant pipe attached to the outdoor heat exchanger, and a flammable refrigerant filling each of the refrigerant pipes. In the air conditioner, indoor unit includes air blow circuit housing indoor heat exchanger, pipe connection housing section located on a back surface of an underframe of indoor unit and that houses pipe connection potion, and leak detection sensor that detects a leak of the flammable refrigerant and that is disposed in air blow circuit. Indoor unit further includes communication path communicatively connecting air blow circuit to pipe connection housing section.