To obtain a joining structure of a vehicle body panel, the structure capable of preventing dripping of an adhesive, while increasing an adhesion area.
A pair of upper side flange part 24 and lower side flange part 44 is connected to a lower end 22B1 and an upper end 42B1 of a pair of vehicle body panel body parts 22, 44, respectively via a pair of upper side first curved part 26 and lower side first curved part 46 which are curved in a mutually separating direction. The upper side first curved part 26 and the lower side first curved part 46 are formed with a plurality of upper side protrusions 30 and a plurality of lower side protrusions 50. The upper side protrusions 30 and the lower side protrusions 50 are formed with space left in the longitudinal directions of the pair of upper side flange part 24 and lower side flange part 44. Further, the upper side protrusions 30 and the lower side protrusions 50 are configured having an upper side second curved part 30C and a lower side curved part 50C which are curved with curvature radii smaller than the upper side curved part 26 and the lower side curved part 46.
Kato Kazunori
Hiroshi Fukuda