In this paper, the piezoelectric new fiber with a metal core is proposed. This fiber was produced by two kinds of manufacture methods (Hydrothermal Method and Extrusion Method). Moreover, new type metal core piezoelectric fiber (Multifunctional fiber and Beaded piezoelectric Fiber) using each manufacture method is produced, and application using the characteristic is shown. Thus, by using the structural feature and characteristic of the manufacture method, the piezoelectric fiber containing a metal core is effective to various applications.