A tsunami breakwater wall of a multilayered steel pipe pile structure 1, includes a multilayered steel pipe pile 2 where a bottom end thereof reaches a predetermined depth of a support layer 28 and is installed to a ground 26 such that an upper end thereof protrudes upward from a ground surface 26a, and a wall body 15 constructed integral with a part of the multilayered steel pipe pile 2 that protrudes upward from the ground surface 26a. The multilayered steel pipe pile 2 is made from a plurality of large diameter steel pipe piles 3-5 of different diameters, an upper end of an inner most side steel pipe pile 3 protrudes upward from the ground surface 26a, and the wall body 15 is constructed to a part of the steel pipe pile 3 protruding upward from the ground surface 26a.