An air conditioner comprising: a compressor; a condenser (121, 122); an expansion device; and an evaporator (151, 152); the air conditioner further comprising: an electric unit including an electric board and first and second heating components (261, 262) 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 (151, 152) 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 (261, 262) are disposed on a topside of the module main body, the first and second heating components (261, 262) 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 (261, 262) at a larger area, wherein the refrigerant tube comprises a main tube connected to an outlet side of the evaporator (151, 152) 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 (261, 262) 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 (151, 152) 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 (261, 262) are disposed on a topside of the module main body, the first and second heating components (261, 262) 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 (261, 262) at a larger area, wherein the refrigerant tube comprises a main tube connected to an outlet side of the evaporator (151, 152) 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.