An outdoor unit of an air conditioner connected to an indoor unit through a gas side refrigerant communication pipe (17a) and a liquid side refrigerant communication pipe (17b) and capable of suppressing the interference of these refrigerant communication pipes even when the pipes are longitudinally or laterally extracted from gas side and liquid side stop valves, comprising the gas side stop valve (18) and the liquid side stop valve (19), the gas side stop valve (18) further comprising a pipe connection port (18a) for connecting the gas side refrigerant communication pipe (17a) thereto, the liquid side stop valve (19) further comprising a pipe connection port (19a) for connecting the liquid side refrigerant communication pipe (17b) thereto, and the pipe connection port (18a) and the pipe connection port (19a) are longitudinally and laterally offset from each other in plan view.
