The volatile oil in flowers of \%Dendranthema morifolium \%(Ramat) Tzvel. cv. Gongju was extracted with steam distillation, the constituents and contents of volatile oil were analyzed by means of GC\|MS\|DS techniques. The result shows that the principle constituents of the volatile oil are bicyclohept\|2\|en\|4\|ol, 2,6,6\|trimethyl\|, acetate (39.64%); benzene,1\|(1,5\|dimethyl\|4\|hexenyl)\|4\|methyl\|,2\|heptene (5.24%); n\|hexadecanoic acid (4.77%); cis\|lanceol (4.73%); acetic acid, 1,7,7\|trimethyl\|bicyclohept\|2\|yl\|ester(3.95%); (-)spathulenol (3.38%); 2,4,6\|trimethyl\|3\|cyclohexene\|1\|carboxaldehyde(3.22%);caryophyllene oxide (2.88%); 1,2,3,4,5,6,7,8\|octahydro\|1,4\|dimethyl\|7\|(1\|methylethenyl)\|,azulene (2.80%); 3\|(1,5\|dimethyl\|4\|hexenyl)\|6\|methylene,cyclohexaene(2.50%); decahydro\|1,4a\|dimethyl\|7\|(1\|methylidene)\|,1\|naphthalenol(2.39%); 1,1,2\|trimethyl\|3,5\|bis(1\|methylethenyl)\|,cyclohexane(2.23%), etc.
