A thermal-type infrared sensor comprising: a heat insulation structure including a substrate portion and a thin film portion which is formed by a hollow portion formed on the substrate portion and which is thinner than the substrate portion; a thermopile including a plurality of first thermopile materials and a plurality of second thermopile materials so that the first thermopile materials and the second thermopile materials are connected alternately in series, and the first thermopile materials and the second thermopile materials are arranged over the thin film portion and the substrate portion; an electrical conduction path of the thermopile; characterised in that the electrical conduction path of the thermopile includes at least one crossed section in which two parts of the conduction path cross each other while being insulated from each other, the crossed section being arranged on the thin film portion and including a conductive material for a crossed section and a wiring material, wherein the conductive material for a crossed section is electrically connected to the wiring material and is in a layer different from the wiring material, and two output sections (5a, 5b); and in that part of the electrical conduction path of the thermopile forms a substantially closed first region (2a; 2c; 2g; 2i), which is a region surrounded by the conduction path but not completely closed when seen from the direction vertical to the arrangement surface of the thermopile, said substantially closed first region including the two output sections (5a, 5b) the conduction path and the at least one crossed section; and in that another part of the conduction path forms a closed second region (2b; 2d; 2e; 2f; 2h; 2k, 2j), which is a region surrounded and closed by the conduction path when seen from a direction vertical to an arrangement surface of the thermopile, said closed second region having the at least one crossed section as a boundary, wherein the first region (2a; 2c; 2g; 2i) and the second region (2b; 2d, 2e, 2f; 2h; 2k, 2j) do not overlap each other, and wherein when a magnetic field passes through the conduction path of the thermopile, a current in a first direction due to the magnetic field flows in the conduction path of the first region (2a; 2c; 2g; 2i) and a current in a second direction due to the magnetic field flows in the conduction path of the second region (2b; 2e, 2f; 2h; 2k), the first direction and the second direction being opposite directions. a heat insulation structure including a substrate portion and a thin film portion which is formed by a hollow portion formed on the substrate portion and which is thinner than the substrate portion; a thermopile including a plurality of first thermopile materials and a plurality of second thermopile materials so that the first thermopile materials and the second thermopile materials are connected alternately in series, and the first thermopile materials and the second thermopile materials are arranged over the thin film portion and the substrate portion; an electrical conduction path of the thermopile; characterised in that the electrical conduction path of the thermopile includes at least one crossed section in which two parts of the conduction path cross each other while being insulated from each other, the crossed section being arranged on the thin film portion and including a conductive material for a crossed section and a wiring material, wherein the conductive material for a crossed section is electrically connected to the wiring material and is in a layer different from the wiring material, and two output sections (5a, 5b); and in that part of the electrical conduction path of the thermopile forms a substantially closed first region (2a; 2c; 2g; 2i), which is a region surrounded by the conduction path but not completely closed when seen from the direction vertical to the arrangement surface of the thermopile, said substantially closed first region including the two output sections (5a, 5b) the conduction path and the at least one crossed section; and in that another part of the conduction path forms a closed second region (2b; 2d; 2e; 2f; 2h; 2k, 2j), which is a region surrounded and closed by the conduction path when seen from a direction vertical to an arrangement surface of the thermopile, said closed second region having the at least one crossed section as a boundary, wherein the first region (2a; 2c; 2g; 2i) and the second region (2b; 2d, 2e, 2f; 2h; 2k, 2j) do not overlap each other, and wherein when a magnetic field passes through the conduction path of the thermopile, a current in a first direction due to the magnetic field flows in the conduction path of the first region (2a; 2c; 2g; 2i) and a current in a second direction due to the magnetic field flows in the conduction path of the second region (2b; 2e, 2f; 2h; 2k), the first direction and the second direction being opposite directions.