To provide a heat and smoke combined type fire sensor to be easily disassembled for cleaning an optical chamber or the like, and to provide its manufacturing method.

This fire sensor is provided with a heat sensing part 15 for sensing an ambient temperature and a scattered light type smoke sensing part D equipped with a light emitting element and a light receiving element for detecting smoke particles in a smoke monitoring area. The smoke sensing part D is disposed in a blind cylindrical labyrinth body 40 for which many light shielding fins 41 for shielding external light and introducing the smoke particles are arrayed at a peripheral part and a printed board 10 is provided on the open side of the blind cylindrical labyrinth body 40. For the heat sensing part 15, one end part is electrically connected to the printed board 10 and the other end side is projected at least from an open hole part 40a formed at the bottom part of the labyrinth body 40 to the outside.