A rear pillar inner provided at a side panel inner and extending upward from a front-side upper portion of a rear wheel house, a rear pillar reinforcement joined to an outside portion of the rear pillar inner, and an outside reinforcing member connecting an outside portion of the side panel inner and the rear wheel house are provided. The rear pillar reinforcement has a rear-side pillar-reinforcement ridge portion extending vertically. The outside reinforcing member has a front-side reinforcing-member ridge portion extending vertically. A lower end portion of the rear pillar reinforcement and an upper end portion of the outside reinforcing member are joined such that the both ridge portions are arranged to align substantially straightly, when viewed from the side, and to slant in such a manner that an upper side thereof is positioned relatively forward compared to a lower side thereof.