Spot welding gun

A spot welding gun comprising:

• an electrode configured to contact a workpiece to be welded;
• and
• a pressing mechanism configured to apply a pressing force to the workpiece by pressing the electrode,
• wherein the pressing mechanism comprises
• a pressing rod that has a distal end to which the electrode is coupled and is configured to reciprocate in an axial direction of the pressing rod, and
• at least one link member that includes a distal end portion and a proximal end portion, the distal end portion being coupled to a proximal end side of the pressing rod via a joint member and extends in a direction inclined with respect to the pressing rod so that the proximal end portion becomes more distant from the electrode, and
• a spring member configured to urge the link member toward the distal end portion, and
• wherein an inclination angle of the link member with respect to the pressing rod decreases as the pressing rod moves toward the electrode.