Vehicle body panel joining structure

A vehicle body panel joining structure that joins a first vehicle body panel and a second vehicle body panel, the vehicle body panel joining structure comprising:

• a structural frame that includes a bottom wall and a pair of side walls that are arranged opposite to each other across the bottom wall, and that has ridgelines formed by the bottom wall and the side walls in the lengthwise direction, one of the side walls having a side wall flange joined to the first vehicle body panel and the other of the side walls having a side wall flange joined to the second vehicle body panel;
• an overlap part in which the first and second vehicle body panels are overlapped and which is arranged in such a way that the structural frame straddles the overlap part;
• a depressed part that is disposed at a position avoiding the ridgelines in the bottom wall of the structural frame and that is abutted by the overlap part;
• and
• a spot welding part that is joined to the depressed part, an end portion of the first vehicle body panel, and an end portion of the second vehicle body panel at the overlap part by means of spot welding.