VEHICLE SIDE STRUCTURE

A step portion that is farther toward a vehicle width direction outside than a cabin inside vertical wall portion, is set on a door inner panel. A portion of the step portion is a first overlapping portion that is arranged in a position overlapping with an outside vertical wall portion of a center pillar in a vehicle side view. A portion of the outside vertical wall portion of the center pillar is a second overlapping portion that faces the first overlapping portion at a distance that is narrower than a distance between the step portion and the cabin inside vertical wall portion. A third overlapping portion that is connected to the first overlapping portion in a position overlapping with the second overlapping portion of the center pillar in the vehicle side view, is set on an end portion of a beltline reinforcement in a length direction thereof.