Abstract: The mud pan of this invention includes the usual trough, with a bottom wall, parallel end walls and side walls diverging upwardly from the bottom wall, and a waste receptacle comprising an outer wall that extends in diverging relation from one side wall of the trough. The worker is thus enabled to easily and efficiently dispose of dirty mud by scraping a putty knife with dirty mud against the outer wall of the waste receptacle instead of creating a mess by slinging the dirty mud on the floor. The contents of a filled waste receptacle will be periodically dumped at a suitable location, such as a nearby barrel.