A transport carriage for transporting workpieces, the transport carriage being movable on a mounting rail in a transport direction. The transport carriage has a transport carriage chassis which supports at least one drive roller that can roll on a drive running surface of the mounting rail and can be driven by a drive motor, the drive motor being carried along with the transport carriage chassis. The transport carriage additionally includes at least one securing device for at least one workpiece. The transport carriage carries along an autonomous power supply device which can supply the drive motor with power. A system is additionally provided for transporting workpieces, having a rail system which has at least one mounting rail and includes at least one such transport carriage which can be moved on the mounting rail in a transport direction.