The utility model discloses a marine air pipe head, including shell body (1), interior casing (2), end cover (3), flange interface (4), flotation pontoon (11), sealed cover (5), shell body (1) inside be equipped with interior casing (2), the top of interior casing (2) is equipped with sealed lid (5) and forms switching chamber (8), and flotation pontoon (11) are the globular switching intracavity of locating, sealed lid (5) is gone up to open has the round hole, encloses between end cover (3), shell body (1) and the interior casing (2) to become to ventilate chamber (9), and interior casing (2) are the ascending tubbiness of opening, and diameter ratio flotation pontoon (11) the diameter that switches over chamber (8) is slightly big, is equipped with air inlet (10) on shell body (1) and switches over chamber (8) below to feed through, air pipe head adopts light weight, high strength degree corrosion -resistant material to make, adopting this kind of structure, can making the flotation pontoon pinpoint, the effectual air breathable channel who closes the cabin avoids water to get into cabin and economy and durability rapidly.