It becomes possible to induce cell death of cancer cells and inhibit cell proliferation of cancer cells. A medicinal agent capable of inhibiting both of GST-[pi] and MRPL17 is contained as an active ingredient, or a medicinal agent capable of inhibiting GST-[pi] and a medicinal agent capable of inhibiting MRPL17 are contained as active ingredients.本發明對於癌細胞可誘導細胞死亡,且抑制細胞增殖。 包含抑制GST-π及MRPL17之藥物作為有效成分,或包含抑制GST-π之藥物與抑制MRPL17之藥物作為有效成分。