Abstract: A tunnel support machine for use in a tunnel forming system wherein the tunnel support machine follows a tunnel-driving machine during the driving operation. Through the operation of the tunnel support machine, a preferably inaccessible tunnel cavity formed by the tunnel-driving machine is supported by a profiled ribbon which is continuously fed to the tunnel support machine and continuously spirally wound thereby into a support tube which lines and reinforces the tunnel cavity. Supply and discharge lines extending rearwardly from the tunnel-driving machine generally in the central area of the tunnel cavity connect to longitudinally extending bores provided in a stationary cylindrical part of a rotary bushing of the tunnel support machine.