A mouth guard including a top mouth piece for engaging the top teeth and a bottom mouth piece for engaging the bottom teeth. The mouth guard also includes a central section having one or more ports for receiving an endotracheal tube, oral gastric tube, and/or oral suction tube. In a first preferred embodiment, a top portion of the central section is attached to the top mouth piece, and a bottom portion of the central section is attached to the bottom mouth piece. In a second preferred embodiment, the entire central section is attached to the bottom mouth piece. The top and bottom mouth pieces are capable of interlocking via male engaging members and female recesses.