An air conditioner (110) includes a refrigerant circuit (120) which connects an outdoor circuit (111a) and a plurality of indoor circuits (112a) connected in parallel. The air conditioner (110) includes a leak detection section (141) which detects leak of a refrigerant from the indoor circuits (112a), and a control section (142) which circulates the refrigerant to perform a refrigeration cycle when the leak detection section (141) detects leak of the refrigerant such that the refrigerant in the indoor circuits (112a) of the refrigerant circuit (120) is at a low pressure. Providing the control section (142) in the air conditioner (110) can reduce the leak of the refrigerant from the indoor circuit at low cost.