An independently-controlled PTC (Positive Temperature Coefficient) heater , comprising: a PTC unit including a guide frame having an opening to which a first PTC element (110-1) and a second PTC element (110-2) are mounted; a first electrode plate having a first body configured to make surface contact with one surface of the first PTC element (110-1) and a first connector extending form the first body ; a second electrode plate having a second body configured to make surface contact with one surface of the second PTC element (110-2) and a second connector extending from the second body ; and a common electrode plate having a third body configured to make contact with the other surfaces of both the first and second PTC elements (110-1, 110-2) and a third connector extending form the third body , wherein the second connector extends at different location from the first connector , the third connector extends at different location from the first and second connectors and wherein the second and the third connectors extend in the same direction as the first connector ; and a heat diffusion fin , characterized in that the independently-controlled PTC heater further comprises: a heating tube in which the PTC unit is mounted and made of a metal material; and an insulation member configured to insulate the first electrode plate , the second electrode plate and the common electrode plate from an outside; and wherein the heat diffusion fin is provided at a side of the heating tube . a PTC unit including a guide frame having an opening to which a first PTC element (110-1) and a second PTC element (110-2) are mounted; a first electrode plate having a first body configured to make surface contact with one surface of the first PTC element (110-1) and a first connector extending form the first body ; a second electrode plate having a second body configured to make surface contact with one surface of the second PTC element (110-2) and a second connector extending from the second body ; and a common electrode plate having a third body configured to make contact with the other surfaces of both the first and second PTC elements (110-1, 110-2) and a third connector extending form the third body , wherein the second connector extends at different location from the first connector , the third connector extends at different location from the first and second connectors and wherein the second and the third connectors extend in the same direction as the first connector ; and a heat diffusion fin , characterized in that the independently-controlled PTC heater further comprises: a heating tube in which the PTC unit is mounted and made of a metal material; and an insulation member configured to insulate the first electrode plate , the second electrode plate and the common electrode plate from an outside; and wherein the heat diffusion fin is provided at a side of the heating tube . a heating tube in which the PTC unit is mounted and made of a metal material; and an insulation member configured to insulate the first electrode plate , the second electrode plate and the common electrode plate from an outside; and wherein the heat diffusion fin is provided at a side of the heating tube . <EOS>