To improve rigidity and workability by integrally connecting a rectangular sectional concrete sheet pile firmly in a ground along the longitudinal direction of a concrete sheet pile with a hat-shaped cross section at the top section of the sheet pile.

The concrete composite sheet pile 1 is composed of a master sheet pile 2 called a concrete corrugated sheet pile with a hat-shaped cross section and a rectangular sectional slave sheet pile 3 integrally connected by an engaging strip at the top section of the hat-shaped cross section of the master sheet pile 2. An engaging recessed strip 6 is formed at the top section of the hat-shaped cross section of the master sheet pile 2, and an engaging projecting strip 7 engaged with the engaging recessed strip 6 is formed to the slave sheet pile 3. The engaging recessed strip 6 molded of a steel plate is fixed on the master sheet pile 2 side by an anchor bolt, the projecting-strip metallic fitting 7 is fastened on the slave sheet pile 3 side by the anchor bolt, and the master sheet pile 2 and the slave sheet pile 3 are united integrally and a composite cross section is spread. Accordingly, the composite sheet pile can resist large bending moment, transport and handling are facilitated, and a wall body can be constructed economically.