PROBLEM TO BE SOLVED: To provide: a substrate with an antibacterial layer, where the antibacterial layer has excellent light resistance and promptly exhibits antibacterial action an antibacterial sheet a radiography device and a touch panel.SOLUTION: A substrate with an antibacterial layer has a substrate and an antibacterial layer that is disposed on at least a part of the surface of the substrate. The antibacterial layer contains at least one silver-containing antibacterial agent, and the amount of silver ions per unit area measured by an extraction test is 15-50 ng/cm2.COPYRIGHT: (C)2016,JPO&INPIT【課題】耐光性に優れ、短時間で抗菌作用を示す抗菌層を備える抗菌層付き基材、抗菌シート、放射線撮影装置、タッチパネルを提供する。【解決手段】基材と、基材表面の少なくとも一部に配置された抗菌層とを有する、抗菌層付き基材であって、抗菌層が、銀を含む抗菌剤を少なくとも1種含み、抽出試験で測定される単位面積当たりの銀イオン量が15~50ng/cm2である、抗菌層付き基材。【選択図】図1