Abstract: A labelling apparatus for tape cassettes is described in which the cassettes are pushed stepwise out of a magazine on to a guide track and advanced along a guide track by one cassette width at a time. A carrier is disposed above the track and carries at least one set of treatment devices, comprising a device for applying an adhesive or adhesive aid, a label applying device and a pressure stamp. In the intervals between two successive feed steps the carrier together with the devices is lowered and in this manner, as the cassette is advanced, the cassette successively has adhesive, a label and pressure applied thereto. Preferably the carrier carries two sets of treatment devices with a turn-over roll for the cassettes disposed between the sets so that the cassettes can be provided on both sides with a label during a single pass through the apparatus.