<p>A liquefied gas carrier (1) wherein a plurality of cargo tanks (11) are arrayed in the lengthwise direction of a hull and they are held in position within a hold by means of cylindrical skirts (4). Each of the cargo tanks is formed in a flattened spherical shape with its diameter in the vertical direction shortened with respect to its diameter in the equatorial plane. Also there is provided an upper deck covering the upper side of the cargo tanks, which is continuous in the lengthwise direction of the hull. The continuous upper deck could be flat, and preferably the both side edge portions thereof are formed to be inclined downwards so as to conform to the shape of the flat cargo tanks. <IMAGE></p>
