Cleaner

A cleaner is disclosed. The cleaner includes: a housing having (1) an introduction opening (8) through which air is 5 introduced; a filtering unit (30) mounted in an inner space (Si) of the housing (1), and defining a dust collection space (S1) between the filtering unit (30) and an inner surface (20) of the housing (1); and a cleaning unit (110) raising and lowering by surrounding the filtering unit (30). At least a 10 portion of the cleaning unit at an initial position thereof is connected to an air introduction path extending from the introduction opening (8) such that the cleaning unit guides a flow of introduced air. A guide edge (GE) extends from a lower portion of the cleaning unit (110) toward a bottom of the dust 15 collection space (S1), and a surface of the guide edge (GE) facing the inner surface (20) of the housing is formed to incline.