An air conditioner comprising: a compressor ; a condenser ; an expansion device ; and an evaporator ; the air conditioner further comprising: an electric unit including an electric board and first and second heating components installed at a surface of the electric board to operate the air conditioner; a cooling module disposed on at least one side of the electric unit to dissipate heat generated from the electric unit ; and at least a portion of a refrigerant tube to supply refrigerant discharged from the evaporator to the cooling module , wherein the refrigerant supplied to the cooling module exchanges heat with the electric unit and then flows to the compressor , characterized in that the cooling module includes a module main body on which the refrigerant tube is disposed, wherein the module main body includes an insertion groove formed in a bottom side of the module main body for inserting the refrigerant tube , wherein the first and second heating components are disposed on a topside of the module main body , the first and second heating components being spaced apart from each other, wherein the refrigerant tube is inserted in the insertion groove and bent two or more times in a U shape such that the refrigerant flowing in the refrigerant tube can exchange heat with the first and second heating components at a larger area, wherein the refrigerant tube comprises a main tube connected to an outlet side of the evaporator and a branch tube branching off from the main tube to the cooling module , and wherein the air conditioner further comprises a flow controller to control an amount of the refrigerant flowing in the main tube to the branch tube . an electric unit including an electric board and first and second heating components installed at a surface of the electric board to operate the air conditioner; a cooling module disposed on at least one side of the electric unit to dissipate heat generated from the electric unit ; and at least a portion of a refrigerant tube to supply refrigerant discharged from the evaporator to the cooling module , wherein the refrigerant supplied to the cooling module exchanges heat with the electric unit and then flows to the compressor , characterized in that the cooling module includes a module main body on which the refrigerant tube is disposed, wherein the module main body includes an insertion groove formed in a bottom side of the module main body for inserting the refrigerant tube , wherein the first and second heating components are disposed on a topside of the module main body , the first and second heating components being spaced apart from each other, wherein the refrigerant tube is inserted in the insertion groove and bent two or more times in a U shape such that the refrigerant flowing in the refrigerant tube can exchange heat with the first and second heating components at a larger area, wherein the refrigerant tube comprises a main tube connected to an outlet side of the evaporator and a branch tube branching off from the main tube to the cooling module , and wherein the air conditioner further comprises a flow controller to control an amount of the refrigerant flowing in the main tube to the branch tube . <EOS>