To provide an accumulator of cartridge shell plates which is small in size, inexpensive and mechanically simple and is easy in maintenance.

The accumulator of the cartridge shell plates is arranged with an OK chute 50 with inclination from 20 to 45°, more preferably from 30 to 35° and feeds metallic sheets 30 toward the OK chute 50 by directing the seams formed at their ends to the top. As a result, the seams of the metallic sheets 30 coming to be fed touch the metallic sheets 30 already accumulated to a lying down posture and the metallic sheets 30 in the lying down posture are erected by the pushing force as a result of the touch and are accumulated in the upright posture with the seams facing downward onto the OK chute 50.