Abstract: A cartridge or injecting device for storing and dispensing medical solutions, such cartridge being characterized by a tubular member with a needle on one end having an opening therethrough communicating with the interior of the tubular member. A slidable drive stopper in the other end of the tubular member has thereon an elongated plunger for advancing and retracting the drive stopper. A non-retractable stopper in the tubular member, in contact with the forward end of the drive stopper, has therethrough a longitudinal opening. The non-retractable stopper is therefore shifted forwardly when the drive stopper is advanced thus serving as a visual indicator showing that medical solution has been ejected from the cartridge.