PURPOSE: To secure the pose of crew and the stability of the boat and facilitate work on the sailboat by providing the front part of a cockpit near a mast with a broad area.

CONSTITUTION: The hull 1 made of FRP has a flat stem end face 2 and is box- shaped with a relatively greater width. A front deck 3 is fitted to a top opening at the bow part of the hull 1, with the mast 4 penetrating through the bow deck 3. The cockpit 9 is formed along the part extending from the rear end of the bow deck 3 to a transom 8, with the front end part thereof having broader area than other rear parts, that is, the cockpit 9 is substantially T-shaped along the longitudinal direction.