To provide a detection device and a display device that can ensure reliability.SOLUTION: A detection device includes an insulating substrate, a plurality of photoelectric conversion elements that are arranged in a detection region of the insulating substrate and output a signal according to light applied to each of the photoelectric conversion elements, a first switching element that is provided corresponding to each of the plurality of photoelectric conversion elements, and includes a first semiconductor, a source electrode and a drain electrode, and an inorganic insulating layer provided between the photoelectric conversion element and the first switching element in the normal direction of the insulating substrate.SELECTED DRAWING: Figure 7【課題】信頼性を確保することが可能な検出装置及び表示装置を提供する。【解決手段】検出装置は、絶縁基板と、絶縁基板の検出領域に配列され、それぞれに照射された光に応じた信号を出力する複数の光電変換素子と、複数の前電変換素子のそれぞれに対応して設けられ、第１半導体、ソース電極及びドレイン電極を含む第１スイッチング素子と、絶縁基板の法線方向において、光電変換素子と第１スイッチング素子との間に設けられた無機絶縁層と、を有する。【選択図】図７
