Mouthpiece may refer to:The part of an object which comes near or in contact with one's mouth or nose during use Mouthpiece or cigarette holder Mouthpiece 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 Mouthpiece, a device attached to demand end of swimmer's or diver's breathing tube Mouthguard, a device protecting the teeth from injury, also known as mouth piece