PURPOSE: An LNG cargo is provided to improve structural strength by manufacturing an insulation box for forming an insulation wall using a fiber reinforced plastic material. CONSTITUTION: An LNG cargo (1) comprises a primary barrier wall (10), a secondary barrier wall (20), and a vacuum insulation panel (30). LNG touches the primary barrier wall. The second barrier wall is arranged under the primary barrier wall and prevents the LNG leaking from the primary barrier wall from touching a hull. The vacuum insulation wall is formed on one or more of the primary and secondary barrier walls and insulates the LNG. A primary insulation wall (12) of the primary barrier wall and a secondary insulation wall (22) of the secondary barrier wall are manufactured using a fiber reinforced plastic material.
