The present invention relates to a nucleic acid molecule simultaneously inhibiting the expression of mTOR gene and STAT3 gene, and an anticancer pharmaceutical composition comprising the same. More specifically, base-paired siRNA or shRNA of the present invention, designed to simultaneously inhibit the expression of cancer-related mTOR gene and STAT3 gene in order to surmount the problem that siRNA or shRNA does not achieve high therapeutic effects due to the target specificity thereof, has the effect of promoting the death of cancer cells. In addition, the nucleic acid has the effect of synergistically enhancing the apoptosis of cancer cells when used in combination with an anticancer agent, finding useful applications as an anticancer composition or anticancer aid against various carcinomas.
