A snorkel for users floating or skin diving on the sea is disclosed. The snorkel includes an inlet tube, a mouthpiece chamber and a mouthpiece. A comber impermeable cap with a first valve is arranged on a top end of the inlet tube while a bottom end of the inlet tube is sleeved with an inlet end of the mouthpiece chamber. A baffle is disposed inside the mouthpiece chamber so as to form an upper chamber and a lower chamber. A second valve is arranged on the inlet end of the mouthpiece chamber so as to make air flow into the mouthpiece chamber or the upper chamber. At least one third valve is arranged on a corresponding outlet end so that air or water is exhausted from the mouthpiece chamber. A mouthpiece is sleeved on top surface of the mouthpiece chamber. The exhaled waste air is unable to enter the inlet tube and is exhausted only through the third valve. Therefore, users can breathe in/out easily without water inhalation or hypoxia.
