Abstract: An adjustable, sanitary, disposable improved dental hand piece cover and dental hand piece noise reducer, having an adjustable head section (28), an adjustable neck section (36), and cylindrical body and handle section, with internally stabilizing and noise reducing material (34), by the utilization of which the dental hand piece is prevented from coming in direct contact with the patients oral cavity or its possible harmful inclusions. The cover is formed of a plastic material, preferably by the process of injection molding or thermoforming of a predetermined shape corresponding to that of the general conventional hand piece to be used. The cover comprises an assembly of two individual halves of injection molded or thermoformed material, that when forcibly united will amply and completely encase the dental hand piece. At least one model variation is formed for use specifically with a slow-speed dental hand piece.