Disclosed is a vehicle body structure which has a sub-window plate and a front fender each disposed at the rear of a headlamp lens on a sidewall of a vehicle body. In the vehicle body structure, a longitudinally-extending concave portion 60 is defined between the front fender 4 and a combination of a front pillar 52 and a hood 2. The concave portion 60 has at least a frontward region partly receiving therein a headlamp lens 10 and a rearward region receiving therein the sub-window plate 30 at the rear of the headlamp lens 10, whereby a plurality of components including at least the headlamp lens 10 and the sub-window plate 30 are received in the concave portion 60 to form a belt-line surface module F which continuously covers the concave portion 60 to define a transparent or semi-transparent exterior surface on the sidewall of the vehicle body. The vehicle body structure of the present invention makes it possible to further effectively utilize a sidewall surface of the vehicle body so as to desirably enhance a function of the sidewall surface as a whole.