PURPOSE: To obtain a product with high reliability by almost eliminating variance of joining strength of a weld zone in resistance welding where one end face forming a plane of a bar member is pressed with the specified pressure on the peripheral surface of a cylindrical member such as a ball joint socket and an AC current (60Hz current, for instance) is applied between both members to perform welding and joining.

CONSTITUTION: The energizing suspension time to stop energizing for the specified time in the main current energizing time for welding is set intermittently and an energizing pattern that one cycle energizing is suspended after three cycle energizing is executed, for instance is repeated three times. After energizing of a main current is completed and the specified cooling time elapses, the energizing suspension time to stop energizing for the specified time even in the temper current energizing time for annealing is set intermittently and an energizing pattern that two cycle energizing is suspended after two cycle energizing is executed, for instance is repeated fifteen times.