Abstract: Surface-treatment appliance having a base arrangement, which in a functional position can be displaced on a surface which is to be treated, and having a guide part articulated on the base arrangement and intended for controlling the base arrangement manually. An arcuate guide is provided on the base arrangement, on which can be displaced in a linear manner a carriage body. The carriage body is connected to the guide part and is supported on the arcuate guide, at least in the radial direction, by at least two supporting points, which are spaced apart from one another along the arcuate guide.