Rhodamine dyes show brilliant reddish color, when applied to natural textile fibers, the most pronounced effect being obtained on silk. But it exhibits such poor wet-fnoess properties that many researchers have been tying to improve them. In this study, Rhodamine 8 was chosen for the dye modification. The tertiary amino group present in Rhodamine 8 was emformed into the secondary amino group and then reacted with epichlorohydrin. The modified Rhodamine which has chlorohydrin-reacting group exhibited improved dyeing and wet-fnoess properties. In additional when applied to silk fabric, it showed almost the same color as Surhodamine 8 which has been most popular among Rhodmine dyes for silk.