Vehicle

A vehicle comprising:

• a vehicle body which is formed in a box shape and includes side walls on both sides in a width direction orthogonal to a travel direction and an expanded portion which is formed between an upper end and a lower end of the side wall so as to be expanded outward in the width direction from the upper end and the lower end;
• a seat which is provided inside the vehicle body and includes a seatback along the side wall and a seat surface extending from the seatback inward in the width direction of the vehicle body, and in which a portion of a rear surface of the seatback which faces the side wall and protrudes farthest toward a side wall side is positioned at a position facing the expanded portion of a vehicle inner side surface of the side wall;
• a door rail which is provided on a vehicle outer side surface of the side wall of the vehicle body so as to extend in the travel direction;
• and
• a side sliding door which is provided on an outside in the width direction from the vehicle outer side surface of the side wall and slides along the door rail,
• wherein the door rail is disposed in at least one of the upper side and a lower side of the expanded portion and is provided inward in the width direction of the vehicle body from the expanded portion.