The present invention relates to a ship having a spherical tank. The top end of the spherical tank (42) of the ship (41) is fixed to the equator part of the spherical tank (42), and the bottom end is supported to a hull (45) through a cylindrical skirt (43) fixed to a foundation deck (4). A longitudinal bulkhead (48) vertically formed on the foundation deck (4) to form the hull (45) has a bottom end located in a position more outer than the top end thereof in a ship width direction, and has an about 1/100 to 1/5 inclination angle from the bottom end to the top end thereof.
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