VEHICLE SIDE PORTION STRUCTURE

A vehicle side portion structure includes a battery case and a lower hinge. The battery case is disposed at a vehicle lower side of a floor panel of a vehicle. The lower hinge is provided at a lower portion of a sliding door that opens and closes a side portion of the vehicle. The lower hinge supports the sliding door to be slidable in the vehicle front-and-rear direction. In a state in which the sliding door is closed, at least a vehicle width direction inner side end portion of the lower hinge is disposed at a vehicle width direction outer side of the battery case in elevation view. In the closed state of the sliding door, the vehicle width direction inner side end portion is disposed at the same position in the vehicle front-and-rear direction as a vehicle width direction outer side end portion of the dividing member.