Abstract: A cartridge collector comprising a rectangular shell having a lateral opening and a bottom opening and including securing means along the lateral opening, for aligning said shell over the ejection port of a rifle. Formed along the transverse edges of the bottom opening are two opposed grooves within which a removable storage receptacle is inserted. The storage receptacle comprises a wire frame enclosed along the lateral and bottom surfaces by a wire mesh and conformed at the upper surface to form an opening receivable within the grooves. In this manner the spent and ejected cartridges are directed by the shell to drop into the removable receptacle where the cartridges are collected for convenient return to one central collection facility.