PURPOSE: To make it possible to develop a special shot loading device which uses a shot coverage replaced by a cannon ball cylinder having a function to hold shot inside for a little while even after the shot are discharged and shows a high density pattern percentage even when bullets are fired from a flat cylinder gun barrel.

CONSTITUTION: In terms of loading for the use of a shotgun which fills up sequentially gunpowder, feed, a loading cylinder, and shot into a cartridge to which a cap is mounted, and seals the opening section of the cartridge, a loading cylinder 20 which houses shot 7 is provided with a cylinder having no cutting end 22 and a disk 21 which keeps contact with the feed in such a fashion that they may share their respective axial line in one piece structure. The other end of the cylinder is opened whereas the outside diameters of the cylinder 22 and the disk 21 are arranged to be slightly smaller than a standard caliber of a shotgun to be applicable. In addition, there is integrally installed at least one ring-shaped projection 24 on the inner surface of the cylinder 22.