A cleaner and chalk dust receptacle for chalk board erasers comprises a box shaped container which is received and supported within a wall mounted cover member. The container has an open top, a bottom wall, a back wall, a front wall, and a pair opposed side walls which are provided with opposed outwardly arcuate convex beads extending longitudinally therealong, and the cover member has an open front, a top wall provided with an opening therethrough, a back wall, and a pair of side walls extending from the open front to the back wall. The interior surface of the side walls are provided with opposed arcuate concave grooves extending longitudinally therealong for slidably receiving the beads of the container. A scraper blade disposed on the top surface of the top wall extends transversely across the opening in the top wall for scraping chalk dust from the bottom surface of chalkboard erasers when they are drawn thereacross.