Mouthpiece may refer to: * The part of an object which comes near or in contact with one's mouth during use * Mouthpiece (smoking pipe) * Mouthpiece (telephone handset) * Mouthpiece (woodwind), a component of a woodwind instrument * Mouthpiece (brass), a component of a brass instrument * Mouthpiece (scuba), a component of a scuba diving or industrial breathing set * Mouthguard, a device protecting the teeth from injury, also known as mouth piece