Center Pillar Structure

A center pillar structure for a vehicle comprises a center pillar including an outer panel and an inner panel that are joined together and form a closed cross section. The inner panel includes a front flange and a rear flange that are elongate in the vertical direction, a front surface and a rear surface that extend toward the vehicle interior side respectively from a rear end of the front flange and a front end of the rear flange, and a base surface that connects the front surface and the rear surface. Dimensions of the front surface and the rear surface in the vehicle width direction increase as the center pillar extends upward from a lower end of the center pillar to a height of the belt line, and decrease as the center pillar further extends upward from the belt line to the upper end.