A viroid was detected in chrysanthemum cv. Chunkwang plants, exhibiting symptoms of stunting in commercial fields in Korea. It was transmissible to Dendranthema grandiflorum, Gynura aurantiaca and Lycopersicon esculentum cv. Rutgers. RNA were extracted from Chrysanthemum stunt viroid(CSVd) infected chrysanthemum and were amplified by reverse transcription and polymerase chain reaction (RT-PCR) using a pair of primers specific for CSV d sequence. The expected amplified cDNA products were detected by agarose gel electrophoresis. The cDNA were cloned and those sequence was determined. CSV d Korean isolate consists of 354 nucleotides. In comparing the nucleotide sequence, it showed a homology of 100%, 99.8% and 97.8% with CSVd isolate of Japan, America and Australia, respectively.