A laser welding apparatus for joining a first member and a second member together by laser welding, the laser welding apparatus comprising: a first laser beam applying device (20a; 30) suitable for applying a first laser beam (S1) to a border area between the first member and the second member ; and a second laser beam applying device (20b; 30) suitable for applying sub-laser beams (S2) to second laser beam application spots on each of the first member and the second member , characterized in that the second laser beam application spots are located ahead of and behind of a first laser beam application spot to which the first laser beam (S1) is applied by the first laser beam applying device, in a laser welding forward direction (X), wherein the second laser beam applying device (20b; 30) is suitable for applying the sub-laser beams (S2) to have second laser beam application spots distanced from the first laser beam application spot the laser welding apparatus further comprising a third laser beam applying device (20c; 30) suitable for applying additional laser beams (S3) to third laser beam application spots on each of the first member and the second member , the third laser beam application spots being located between the first laser beam application spot to which the first laser beam (S1) is applied by the first laser beam applying device (20a; 30), in the laser welding forward direction (X), and the second laser beam application spots to which the sub-laser beams (S2) are applied by the second laser beam applying device, in the laser welding forward direction (X), wherein the first laser beam application spot, second laser beam application spots, and third laser beam application spots are located on an X-shape such that the first laser beam application spot is located at a center of the X-shape. a first laser beam applying device (20a; 30) suitable for applying a first laser beam (S1) to a border area between the first member and the second member ; and a second laser beam applying device (20b; 30) suitable for applying sub-laser beams (S2) to second laser beam application spots on each of the first member and the second member , characterized in that the second laser beam application spots are located ahead of and behind of a first laser beam application spot to which the first laser beam (S1) is applied by the first laser beam applying device, in a laser welding forward direction (X), wherein the second laser beam applying device (20b; 30) is suitable for applying the sub-laser beams (S2) to have second laser beam application spots distanced from the first laser beam application spot the laser welding apparatus further comprising a third laser beam applying device (20c; 30) suitable for applying additional laser beams (S3) to third laser beam application spots on each of the first member and the second member , the third laser beam application spots being located between the first laser beam application spot to which the first laser beam (S1) is applied by the first laser beam applying device (20a; 30), in the laser welding forward direction (X), and the second laser beam application spots to which the sub-laser beams (S2) are applied by the second laser beam applying device, in the laser welding forward direction (X), wherein the first laser beam application spot, second laser beam application spots, and third laser beam application spots are located on an X-shape such that the first laser beam application spot is located at a center of the X-shape. <EOS>