An accumulator connected to a compressor, the accumulator including a case that forms a space in which liquid refrigerant and gaseous refrigerant are accommodated, a suction pipe which is connected to the case, and at least one connection pipe which connects a side surface of the case and a suction side of the compressor, whereby a space between a side surface of the compressor and a side surface of the accumulator is less than a length of a portion of the connection pipe from the side surface of the compressor to the side surface of the accumulator.