A dispenser for discharging media, particularly liquids, foams and pastes is proposed and whose dispenser casing is secured against dismantling. A securing section is provided which is engaged on the pump casing separately from a functional section. The securing section is connected by positive or frictional engagement with the functional section and in the joined state limits a first locking profiling provided on the functional section with regards to its elastic resilience, so that a second locking profiling provided on the pump casing and corresponding with the locking profiling of the functional section can no longer be overcome for dismantling purposes.