Disclosed is an air conditioner with a compressor fixation structure having improved product reliability due to strengthened hardness of a boss. The air conditioner includes a compressor for compressing a refrigerant, a base for supporting the compressor, a compressor support coupled to the base to support the compressor; at least one boss protruding from the base, a vibration absorption member for absorbing vibration generated by the compressor, and a fastening member, wherein the fastening member is inserted into the boss and the vibration absorption member, and at least a portion of the fastening member protrudes below a bottom surface of the base.