[Problem] There is a demand for a therapeutic method for enhancing the efficacy of a taxane-family anti-tumor agent against various tumors. [Means for Solution] The inventors conducted an investigation on the method for enhancing the anti-tumor effect of taxane-family anti-tumor agents, and as a result, the inventors confirmed that a composition for cancer treatment comprising N 2 -[(2E)-3-(4-chlorophenyl)-2-propenoyl]-N-[2-oxo-2-(4-{[6-(trifluoromethyl)pyrimidin-4-yl]oxy}piperidin-1-yl)ethyl]-3-pyridin-2-yl-L-alaninamide (FK330) or a salt thereof as an active ingredient, enhances the anti-tumor effect of taxane-family anti-tumor agents, thus completing the invention. That is, the invention relates to a composition for cancer treatment comprising FK330 or a salt thereof as an active ingredient, which is for combined administration with one or more anti-tumor agents selected from taxane-family anti-tumor agents.
