Abstract: A carriage body for a rail vehicle, in particular for a high-speed train, said carriage body having a base and lateral walls that extend upwards on opposing sides of the base. The base and the lateral walls delimit an interior of the carriage body for transporting persons and/or goods. A longitudinal support for transmitting longitudinal forces is located in each transitional region between the base and the lateral walls, said longitudinal support extending in the longitudinal direction of the carriage body. The carriage body has at least one undercarriage support that extends below the base from the one longitudinal support to the other longitudinal support, said undercarriage support extending partly at a distance to the base so that a space for receiving at least one device for operating the rail vehicle is formed between the undercarriage support and the base.