An air conditioner is provided. The air conditioner may include an electronic device, which may include a control component to drive a refrigerant cycle, and a cooling tube through which a refrigerant to cool the electronic device may flow. The cooling tube may be coupled to one side of the electronic device. The electronic device may include an electronic case having at least one through hole, an electronic board to which the control component may be coupled, the electronic board being disposed in the electronic case, at least one heat transfer plate disposed to contact the control component, the at least one heat transfer plate being coupled to the electronic case, and at least one heat sink, to which the cooling tube may be coupled, the at least one heat sink contacting the at least one heat transfer plate through the at least one through hole.