Abstract: A full-face snorkel mask includes a mask assembly having a breathing chamber and a snorkel assembly having a fresh air intake channel and an exhaust air discharging channel. The fresh air intake channel guides fresh air into the breathing chamber and the exhaust air discharging channel discharges waste air from the breathing chamber. During snorkeling, fresh air is supplied via the fresh air intake channel to the breathing chamber for a user and the waste air exhaled from the user is discharged from the breathing chamber to the exhaust air discharging channel. Therefore, fresh air is separated from the waste air to prevent the user from repeatedly inhaling the waste air in the breathing chamber.