A heat module comprising: a heat unit; an insulator configured to insulate the heat unit; and a fixing part configured to fix the heat unit at a certain location on the insulator; the heat unit comprising: a conductor configured to cause electricity to flow therethrough in a lengthwise direction; and a heating element configured to generate heat from the electricity transferred thereto from the conductor, wherein the heating element surrounds the conductor in the lengthwise direction to prevent occurrence of electric shock; characterized in that the heat unit is located at one side of the insulator, wherein the insulator comprises a through-space configured such that the heat unit is prevented from passing therethrough but the fixing part is allowed to pass therethrough, and wherein the fixing part comprises: a fixing exposure part located at another side of the insulator; a fixing pass part extending from one end of the fixing exposure part to pass through the through-space; and a fixing and surrounding part extending from the fixing pass part to surround the heat unit located at the one side of the insulator. a heat unit; an insulator configured to insulate the heat unit; and a fixing part configured to fix the heat unit at a certain location on the insulator; the heat unit comprising: a conductor configured to cause electricity to flow therethrough in a lengthwise direction; and a heating element configured to generate heat from the electricity transferred thereto from the conductor, wherein the heating element surrounds the conductor in the lengthwise direction to prevent occurrence of electric shock; characterized in that the heat unit is located at one side of the insulator, wherein the insulator comprises a through-space configured such that the heat unit is prevented from passing therethrough but the fixing part is allowed to pass therethrough, and wherein the fixing part comprises: a fixing exposure part located at another side of the insulator; a fixing pass part extending from one end of the fixing exposure part to pass through the through-space; and a fixing and surrounding part extending from the fixing pass part to surround the heat unit located at the one side of the insulator. a conductor configured to cause electricity to flow therethrough in a lengthwise direction; and a heating element configured to generate heat from the electricity transferred thereto from the conductor, wherein the heating element surrounds the conductor in the lengthwise direction to prevent occurrence of electric shock; characterized in that the heat unit is located at one side of the insulator, wherein the insulator comprises a through-space configured such that the heat unit is prevented from passing therethrough but the fixing part is allowed to pass therethrough, and wherein the fixing part comprises: a fixing exposure part located at another side of the insulator; a fixing pass part extending from one end of the fixing exposure part to pass through the through-space; and a fixing and surrounding part extending from the fixing pass part to surround the heat unit located at the one side of the insulator. a fixing exposure part located at another side of the insulator; a fixing pass part extending from one end of the fixing exposure part to pass through the through-space; and a fixing and surrounding part extending from the fixing pass part to surround the heat unit located at the one side of the insulator.