A colorful fastener tape for a slide fastener chain and a fastener stringer comprising such a fastener tape have an ornamental portion arranged along an inner longitudinal edge of the fastener tape and formed by multicolored yarns. A multicolored cord or a number of multicolored yarns are woven or knitted into the fastener tape 1 along the inner longitudinal edge to produce a thickened reinforced section, thus producing an ornamental portion such as of rainbow colored. Fastener elements of various types may be fitted to the reinforced section of the fastener tape of the a fastener stringer, thus the fastener stringer has a beautiful ornamental portion. When multicolored yarns are used for several warps or warp knitting yarns located adjacent to the reinforced section, a broadened ornamental portion can be produced to enhance the color effect of the fastener stringer that may be used for a dress to improve its color effect.