PURPOSE: A container ship is provided to increase the load of cargo by widening the width of a loading space in a container ship. CONSTITUTION: A container ship has a double wall structure. The double walls(21b,21c) are installed the bottom(10) and the side(20) of a ship. A space is formed between the double walls. The width of the side of the ship becomes narrow, as a result of which the loading space in the container ship becomes wider. A path(21) is formed on the upper end of the side of the ship. The path comprises both walls and ceiling and has a tunnel structure, which is communicated in the longitudinal direction of the ship.
