the present invention relates to a method for treating a cancer comprising orally administering a composition containing α , α , α - trifluorothymidine and 5 - chloro - 6 - methyl ) uracil hydrochloride in a molar ratio of 1 : 0 . 5 at a dose of 20 to 80 mg / m 2 / day in terms of ftd in 2 to 4 divided portions per to patients in need of the treatment .