STRUCTURE OF CONNECTION PART IN VEHICLE SIDE PART

PROBLEM TO BE SOLVED: To provide a structure of a connection part in a vehicle side part, which efficiently transfers a lateral collision load to a locker without increasing the number of parts.SOLUTION: In the structure of a joining part in a vehicle side part, a proportion of a vehicle width directional dimension wi of a pillar inner 60 in a vehicle width directional total width dimension W comprising widths of a pillar outer reinforcement 44 and the pillar inner 60, is increased gradually to a connection part between a center pillar 16 and the locker 24, and the vehicle width directional dimension wi of the pillar inner 60 is larger than a vehicle width directional dimension wo of the pillar outer reinforcement 44 at the joining part between the center pillar 16 and the locker 24. Accordingly, the efficiency of load transference from the pillar inner 60 to a locker inner panel 26, is improved without providing any reinforcement member, and the stiffness of the joining part between the center pillar 16 and the locker 24, where the locker 24 is defined as an open cross section, is improved, thereby the center pillar 16 is controlled to hardly fall inward in the vehicle width direction.