A new composite structure for bridge pier with the use of the steel-frame elements has been proposed to reduce construction labor and period. The composite structure consists of concrete and the steel-frame elements which have lateral joints to connect each other and openings to act as shear connectors. For a hollow pier, the steel-frame elements consist of inner and outer plates connected by tie-plates to prevent plates from buckling. In order to investigate the seismic behavior of the composite hollow pier, the cyclic horizontal loading tests were carried out. The experiments indicated that the longitudinal and transverse steel of the elements acted as reinforcing bar and the composite bridge pier showed high ductility under the influence of tie-plate.