Abstract: A gun cleaner consisting of a plastic bag having a pouch adapted to receive the gun to be cleaned with its barrel pointed downward, and having an elongated barrel-receiving portion of reduced cross-sectional size, the bag being adjustable so that the barrel-receiving portion may be of a length suitable to receive the barrel of the gun. The barrel-receiving portion is foldable to a position in which the length of the barrel-receiving portion accommodates the gun barrel yet is not so large that it uses an excessive amount of cleaning solution or solvent. The barrel-receiving portion may be unfolded into a position to form a solvent or liquid cleaner-receiving chamber below the barrel so that this liquid may flow or drain downwardly into said solvent-receiving chamber.