Abstract: An apparatus for surface processing of plastically deformable masses, fresh concrete, mortar or screed is disclosed. The apparatus includes an L-shaped housing having a first housing axis and a second housing axis. The first housing axis and the second housing axis intersect one another at an angle. The L-shaped housing includes a handle, which is arranged along the first housing axis, and a receptacle for an energy store formed at a free end of the handle. The L-shaped housing further includes a head portion is arranged along the second housing axis and a base plate arranged at a free end of the head portion. The apparatus includes a vibration unit accommodated at least in sections within the head portion and on which the base plate is arranged.