Seat for two-wheeled vehicle

A seat for a two-wheeled vehicle comprising:

• a front seat;
• a rear seat;
• and
• a lumbar support portion provided between the front seat and the rear seat,
• wherein:
• the lumbar support portion is formed into an arc shape having a left side and a right side, from a seated passenger perspective, and which together constitute both sides of the lumbar support portion, with both sides protruding forward;
• the lumbar support portion includes an internal padding material formed continuously;
• bulging portions having surface sides of left and right side regions that together constitute both side regions including said both sides of the lumbar support portion bulging in a forward direction of the vehicle are formed on said both side regions;
• the front seat, the lumbar support portion and the rear seat are integrally covered with a single sheet of a skin;
• ends of both sides of the lumbar support portion are formed to be separated from a seat surface of the front seat;
• and
• cut portions are provided in the skin between bottom sides of said both sides of the lumbar support portion and a seat portion of the front seat on which the seated passenger sits.