A mouthpiece for reducing snoring is provided. The mouthpiece includes an upper guard configured to fit over the upper teeth of a user, a lower guard configured to fit over the lower teeth of the user, a spacer assembly provided between the upper guard or the lower guard to provide an air passage at a middle section of the mouthpiece, a first adjustable assembly attached to the left side of the upper guard and the left side of the lower guard, and a second adjustable assembly attached to the right side of the upper guard and the right side of the lower guard. The first adjustable assembly and the second adjustable assembly are operable to move the lower guard relative to the upper guard.
