A burner (20) is provided with: a cylinder section (21) having a premixing chamber (27) in which a mixed gas which contains fuel is formed, and also having a combustion chamber (28) in which the fuel combusts; a first pipe (41) for supplying fuel heated by an electric heater (46) to the premixing chamber (27); and a second pipe (50) having provided therein a heat exchange section (55) which converts the combustion heat of fuel to the vaporization heat of the fuel and supplying the fuel heated by the heat exchange section (55) to the premixing chamber (27). The second pipe (50) is branched at a branch point (48) from the first pipe (41), and the electric heater (46) and the heat exchange section (55) are connected in parallel to the premixing chamber (27).
