Welding structure and method for manufacturing welding structure

A method for manufacturing a welding structure in which a first member and a second member are joined to each other by welding, wherein

• assuming that a direction in which the first and second members are arranged is a first direction and a direction perpendicular to the first direction is a second direction,
• the welding structure includes:
• a press-fit portion in which the second member is press-fit on the first member;
• a first cavity formed on one side of the press-fit portion in the second direction;
• a second cavity formed on the other side of the press-fit portion in the second direction;
• a first weld bead formed between the first cavity and an end of a joining part between the first member and the second member on the one side in the second direction;
• a second weld bead formed between the second cavity and an end of the joining part on the other side in the second direction;
• a cutout groove communicating between the first cavity and the second cavity, and
• the method includes forming the first weld bead by welding the first member and the second member to each other while the second cavity is communicated with outside and the first cavity and the second cavity are communicated with each other through the cutout groove.