PROBLEM TO BE SOLVED: To provide a kit or device for predicting drug efficacy of nivolumab, and a detection method. A nivolumab drug efficacy prediction kit or device comprising a nucleic acid capable of specifically binding to miRNA in a sample of a subject, or a complementary strand thereof, and a nivolumab drug efficacy comprising measuring the miRNA in vitro. How to predict. [Selection diagram] None【課題】ニボルマブ薬効予測用キット又はデバイス、並びに、検出方法を提供する。【解決手段】被験体の検体中のｍｉＲＮＡと特異的に結合可能な核酸、又はその相補鎖を含む、ニボルマブ薬効予測用キット又はデバイス、並びに、該ｍｉＲＮＡをｉｎ ｖｉｔｒｏで測定することを含むニボルマブ薬効を予測する方法。【選択図】なし
