A new type of sea wall with an arch member of concrete has been developed and is called as an arch-shaped sea wall. The arch-shaped sea wall is applicable to the deep sea area. The vertical component of earch pressure or wave force acting on the arch-shaped part of structure increase contact pressure between the bottom of structure and the foundation soil. Then the stability of the wall against sliding will increase. Therefore, the weight of structure can be minimized. 　The calculation method for the earth pressure acting on arch-shaped sea wall has not yet well established. Especially, when the wave force acts on teh sea wall, the earth pressure will become larger than the active earth pressure. This study is aiming to establish appropriate desgin consideration on the earth pressure. 　Therefore, the earth pressures acting aon the arch-shaped sea wall are evaluated with several kinds of calculation methods. (Coulomb's method, the method of technical standards for port and harbor facilities, FEM, etc.).