The authors propose sheet-pile foundation as a new viable foundation structure. The construction costs of this type of foundation are lower than those for pile foundation, and it can be used more widely than shallow foundation. In this research, a series of laboratory static loading tests and full-scale field tests were carried out to evaluate the fundamental characteristics of sheet-pile foundation. The tests showed that its horizontal resistance is larger than that of shallow foundation, and that it exhibits excellent performance against seismic forces.