A laser welding method according to the present disclosure includes a coupling forming step and a welding step. In the coupling forming step, a T coupling is formed by superimposing a side surface of a first member and a lower surface of a second member on each other. In the welding step, an upper surface of the second member opposite to the lower surface is irradiated with a laser beam so that the first member and the second member are welded to each other by the laser beam. Moreover, in the welding step, the laser beam is moved in a direction along the side surface of the first member while being weaved.