This application relates to a novel benzo-heterocycle derivative and more particularly, it relates a composition for preventing and treating cancer or for inhibiting metastasis comprising benzo-heterocycle derivative or pharmaceutically acceptable salts thereof as an active ingredient. The present inventors confirmed that KRS has an effect on cancer metastasis by facilitating cancer (or tumor) cell migration through interaction with 67LR, and also found that a substance inhibiting the interaction between KRS and 67LR can prevent and treat cancer by inhibiting cancer cell metastasis. Accordingly, the composition of the present invention can inhibit cancer metastasis, and thus provide a novel means for prevention and treatment of cancer.
