An infrared sensor comprising: an insulating film; a pair of first adhesive electrodes that is patterned on one surface of the insulating film; a pair of first terminal electrodes that is patterned on the one surface of the insulating film; a first heat sensitive element that is provided on the one surface of the insulating film and is connected to the pair of first adhesive electrodes; a pair of first pattern wiring parts that is patterned on the one surface of the insulating film with one end thereof being connected to the pair of first adhesive electrodes and the other end thereof being connected to the pair of first terminal electrodes; a pair of second adhesive electrodes that is patterned on the one surface of the insulating film; a pair of second terminal electrodes that is patterned on the one surface of the insulating film; a second heat sensitive element that is provided on the one surface of the insulating film and is connected to the pair of second adhesive electrodes; a pair of second pattern wiring parts that is patterned on the one surface of the insulating film with one end thereof being connected to the pair of second adhesive electrodes and the other end thereof being connected to the pair of second terminal electrodes; an infrared reflective film that is patterned on the other surface of the insulating film so as to cover a part directly above the second heat sensitive element; and, a heat transfer film that is connected to the first adhesive electrode besides the first pattern wiring part and is patterned in the vicinity of the first adhesive electrode on the one surface of the insulating film using a thin film having a higher thermal conductivity than that of the insulating film, characterized in that the first terminal electrodes are arranged on the side of the first heat sensitive element opposite to the side of the second heat sensitive element; and, the pair of first pattern wiring parts extend from the pair of first adhesive electrodes toward the second heat sensitive element to the vicinity of the second heat sensitive element, and each of the pair of first pattern wiring parts then extends in opposite directions from each other and further extends along a part of the outer periphery of the heat transfer film so as to reach the first terminal electrode, wherein the heat transfer film is formed so as to have a larger area than that of the pattern wiring part (6A, 6B). an insulating film; a pair of first adhesive electrodes that is patterned on one surface of the insulating film; a pair of first terminal electrodes that is patterned on the one surface of the insulating film; a first heat sensitive element that is provided on the one surface of the insulating film and is connected to the pair of first adhesive electrodes; a pair of first pattern wiring parts that is patterned on the one surface of the insulating film with one end thereof being connected to the pair of first adhesive electrodes and the other end thereof being connected to the pair of first terminal electrodes; a pair of second adhesive electrodes that is patterned on the one surface of the insulating film; a pair of second terminal electrodes that is patterned on the one surface of the insulating film; a second heat sensitive element that is provided on the one surface of the insulating film and is connected to the pair of second adhesive electrodes; a pair of second pattern wiring parts that is patterned on the one surface of the insulating film with one end thereof being connected to the pair of second adhesive electrodes and the other end thereof being connected to the pair of second terminal electrodes; an infrared reflective film that is patterned on the other surface of the insulating film so as to cover a part directly above the second heat sensitive element; and, a heat transfer film that is connected to the first adhesive electrode besides the first pattern wiring part and is patterned in the vicinity of the first adhesive electrode on the one surface of the insulating film using a thin film having a higher thermal conductivity than that of the insulating film, characterized in that the first terminal electrodes are arranged on the side of the first heat sensitive element opposite to the side of the second heat sensitive element; and, the pair of first pattern wiring parts extend from the pair of first adhesive electrodes toward the second heat sensitive element to the vicinity of the second heat sensitive element, and each of the pair of first pattern wiring parts then extends in opposite directions from each other and further extends along a part of the outer periphery of the heat transfer film so as to reach the first terminal electrode, wherein the heat transfer film is formed so as to have a larger area than that of the pattern wiring part (6A, 6B).