To suppress the generation of metal powder, the breakage of a material to be joined and the consumption of an electrode.

Welding equipment includes: an electrode 10a which abuts on the material 3 to be joined that is a laminate of a plurality of plates made of metal; an electrode 10b which is opposed to the electrode 10a with the material 3 between both electrodes; a pressurizing mechanism which pressurize at least one of the electrodes 10a, 10b and causes the electrodes 10a, 10b to clamp the material 3; temperature measuring means for measuring the temperatures of the distal end parts of the electrodes 10a, 10b which abut on the material 3; and a welding power source 2 for supplying the current to the electrodes 10a, 10b. The electrodes 10a, 10b are each composed of metal or alloy which contains at least one element of molybdenum, tungsten, iron, nickel and titanium. The welding power source 2 controls current supply quantities to the electrodes 10a, 10b so that the temperatures of the distal end parts of the electrodes 10a, 10b are temperatures less than the melting point of the material 3.