A heat exchanger comprising: a plurality of refrigerant tubes spaced apart from each other; a plurality of headers coupled to end portions of the refrigerant tubes; and a plurality of heat exchange fins coupled to outer surfaces of the refrigerant tubes and disposed spaced apart from each other in a direction perpendicular to a direction in which the refrigerant tubes extend, wherein each of the heat exchange fins comprises: a plurality of insertion grooves to allow the refrigerant tubes to be inserted thereinto; and a plurality of bonding plates bonded to the refrigerant tubes when the refrigerant tubes are inserted into the insertion grooves, wherein each of the bonding plates comprises: a first bonding portion curved from one end portion thereof in a first direction and bonded to one surface of a corresponding one of the refrigerant tubes; and a second bonding portion curved from the other end portion thereof, the heat exchanger being characterized in that the second bonding portion is curved in a second direction opposite to the first direction and bonded to a corresponding one of the refrigerant tubes. a plurality of refrigerant tubes spaced apart from each other; a plurality of headers coupled to end portions of the refrigerant tubes; and a plurality of heat exchange fins coupled to outer surfaces of the refrigerant tubes and disposed spaced apart from each other in a direction perpendicular to a direction in which the refrigerant tubes extend, wherein each of the heat exchange fins comprises: a plurality of insertion grooves to allow the refrigerant tubes to be inserted thereinto; and a plurality of bonding plates bonded to the refrigerant tubes when the refrigerant tubes are inserted into the insertion grooves, wherein each of the bonding plates comprises: a first bonding portion curved from one end portion thereof in a first direction and bonded to one surface of a corresponding one of the refrigerant tubes; and a second bonding portion curved from the other end portion thereof, the heat exchanger being characterized in that the second bonding portion is curved in a second direction opposite to the first direction and bonded to a corresponding one of the refrigerant tubes. a plurality of insertion grooves to allow the refrigerant tubes to be inserted thereinto; and a plurality of bonding plates bonded to the refrigerant tubes when the refrigerant tubes are inserted into the insertion grooves, wherein each of the bonding plates comprises: a first bonding portion curved from one end portion thereof in a first direction and bonded to one surface of a corresponding one of the refrigerant tubes; and a second bonding portion curved from the other end portion thereof, the heat exchanger being characterized in that the second bonding portion is curved in a second direction opposite to the first direction and bonded to a corresponding one of the refrigerant tubes. a first bonding portion curved from one end portion thereof in a first direction and bonded to one surface of a corresponding one of the refrigerant tubes; and a second bonding portion curved from the other end portion thereof, the heat exchanger being characterized in that the second bonding portion is curved in a second direction opposite to the first direction and bonded to a corresponding one of the refrigerant tubes.