Objectives : The purpose of this study is to make nine classical needles understood easily through interpreting Nine Classical Needles in Rhymes. Methods : The principle of classification and clinical application of Nine Classical Needle was sorted out referring to "The beginning of Nine Classical Needles in Rhymes" and "The prescription and treatment of Nine Classical Needles in Rhymes" which is the chapter of "Golden Mirror of Medicine". Results & Conclusions : The Nine Classical Needles, which were designed to get harmonious interaction between human beings and the nature, have been representative medical appliance in Korean Medicine. The needles consist of shear needle, round-pointed needle, spoon needle, lance needle, stiletto needle, round-sharp needle, filiform needle, long needle, and big needle. Nine Classical Needles in Rhymes was formed in a poem format to help us easily memorize the essential contents of Nine Classical Needles. "The beginning of Nine Classical Needles in Rhymes" dealt with the reasons of making needles and organization principles about Nine Classical Needles. "The prescription and treatment of Nine Classical Needles in Rhymes" sorted main treatment applications of nine needles, helping understand needles as medical appliance.