A vehicle-mounted concrete pump, wherein the vehicle-mounted concrete pump comprises: - a concrete pump system, wherein the concrete pump system is designed to convey concrete, - a hydraulic drive pump system, wherein the hydraulic drive pump system is designed to drive the concrete pump system and has a hydraulic pump drive shaft, - a combustion drive motor system, wherein the combustion drive motor system is designed to drive the hydraulic pump drive shaft of the hydraulic drive pump system, - a liquid-cooled synchronous drive motor, wherein the liquid-cooled synchronous drive motor is designed to drive the hydraulic pump drive shaft of the hydraulic drive pump system, - a superstructure, wherein the superstructure carries the concrete pump system, - a vehicle frame, wherein the vehicle frame carries the superstructure, - wherein the liquid-cooled synchronous drive motor is spatially arranged in part between main longitudinal members of the superstructure and/or of the vehicle frame, - at least one driving axle, wherein the combustion drive motor system is designed to drive the at least one driving axle, and - a transfer case, wherein the transfer case is designed to connect, in particular mechanically, the combustion drive motor system either to the at least one driving axle or to the hydraulic pump drive shaft of the hydraulic drive pump system, - wherein the hydraulic drive pump system has a number of hydraulic drive pumps, and - wherein the transfer case has an input side and an opposite output side, wherein the combustion drive motor system and the liquid-cooled synchronous drive motor are spatially arranged on the input side, and the number of hydraulic drive pumps is spatially arranged on the output side. - a concrete pump system, wherein the concrete pump system is designed to convey concrete, - a hydraulic drive pump system, wherein the hydraulic drive pump system is designed to drive the concrete pump system and has a hydraulic pump drive shaft, - a combustion drive motor system, wherein the combustion drive motor system is designed to drive the hydraulic pump drive shaft of the hydraulic drive pump system, - a liquid-cooled synchronous drive motor, wherein the liquid-cooled synchronous drive motor is designed to drive the hydraulic pump drive shaft of the hydraulic drive pump system, - a superstructure, wherein the superstructure carries the concrete pump system, - a vehicle frame, wherein the vehicle frame carries the superstructure, - wherein the liquid-cooled synchronous drive motor is spatially arranged in part between main longitudinal members of the superstructure and/or of the vehicle frame, - at least one driving axle, wherein the combustion drive motor system is designed to drive the at least one driving axle, and - a transfer case, wherein the transfer case is designed to connect, in particular mechanically, the combustion drive motor system either to the at least one driving axle or to the hydraulic pump drive shaft of the hydraulic drive pump system, - wherein the hydraulic drive pump system has a number of hydraulic drive pumps, and - wherein the transfer case has an input side and an opposite output side, wherein the combustion drive motor system and the liquid-cooled synchronous drive motor are spatially arranged on the input side, and the number of hydraulic drive pumps is spatially arranged on the output side.