A steering column includes an adjustment unit having a steering spindle rotatably supported in a casing pipe about a longitudinal axis. A carrier unit configured to receive the casing pipe includes at least one clamping face facing the casing pipe. A clamping device clamps the clamping face against the casing pipe to longitudinally fix the adjustment unit relative to the carrier unit, releases the clamping face from the casing pipe and releases an adjustment of the adjustment unit relative to the carrier unit at least in the longitudinal direction. The carrier unit includes at least one sliding face facing the casing pipe along which the casing pipe can be moved longitudinally in the release position. The sliding face may be arranged on a support device which presses the sliding face against the casing pipe with a support force which can be predetermined independently of the clamping force.