Abstract: A coach body of a rail vehicle has horizontal and vertical walls, the horizontal walls serving to form both a floor and a ceiling, while the vertical walls forming side walls, the vertical walls having cutouts for at least one window and one boarding door, the horizontal and vertical walls being formed by modules of fiber-reinforced plastic divided sectionally crosswise to a longitudinal axis of the coach body, each two of these hand-modules which are complimentary to one another and are joined in a force-transmitting way at the horizontal walls which meet in a middle of the vehicle forming one longitudinal section of the coach body, and a length of the coach body being formed accordingly by a force-transmitting connection of a number of the longitudinal sections at abutting points extending all the way around in transverse direction of the vehicle.