of the same inner side wall portion of a vehicle body and process for producing

Inner side wall panel (1) of a motor vehicle body, which to a rear wheel mounting extending at least from an A-pillar and a front and a rear, each prefabricated and a closed frame forming single-piece side part (2; 3), wherein both side parts ( 2; 3) arranged in the vehicle longitudinal direction and (in the region a B-pillar 6) are fixedly connected together, characterized in that the two side parts (2; 3) of the inner side wall part (1) to each other. corresponding and overlapping B-pillar halves in the form of an inner and an outer member (6b; 6a) form, which are a large area fixedly connected in the immediate area of ​​the B-column (6) together, wherein either the inner or the outer element ( 6b; 6a) forms the closure plate of the B-pillar.