PROBLEM TO BE SOLVED: To provide an agent that can dramatically enhance the antitumor effect of anticancer agent.SOLUTION: An agent for enhancing the antitumor effect of an anticancer agent contains a prolyl hydroxylase inhibitor as an active ingredient.SELECTED DRAWING: NoneCOPYRIGHT: (C)2018,JPO&INPIT【課題】本発明は、抗癌剤の抗腫瘍効果を劇的に増強し得る薬剤を提供することを目的とする。【解決手段】プロリル水酸化酵素阻害剤を有効成分とする、抗癌剤の抗腫瘍効果の増強剤。【選択図】なし