TECHNICAL FIELD The present invention relates to a substrate with an antibacterial layer provided with an antibacterial layer capable of maintaining antibacterial properties in a short time and capable of maintaining antimicrobial property for a long period, and an antibacterial layer, a radiation imaging device having the substrate with the antibacterial layer, a touch panel, Provide the body. The substrate with an antimicrobial layer of the present invention is a substrate with an antimicrobial layer comprising a substrate and an antimicrobial layer disposed on at least a part of the surface of the substrate, wherein the antimicrobial layer comprises a silver-And a porous carrier capable of supporting silver ions and capable of supporting silver ions, wherein the average particle diameter of the antibacterial agent is Da, the average particle diameter of the porous carrier is Db, and the average thickness of the antibacterial layer is T, the following relationship is satisfied. Equation (1) T / Da> 3.0 Expression (2) T / Db 3.0 The unit of Da, Db, and T is m.本発明は、短時間で抗菌性を示すと共に、抗菌性を長期間維持できる抗菌層を備える抗菌層付き基材、並びに、抗菌シート、上記抗菌層付き基材を備える放射線撮影装置およびタッチパネル、積層体を提供する。本発明の抗菌層付き基材は、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、銀を含む抗菌剤と、銀が担持されてもよい、銀イオンを吸着可能な多孔性担体とを含有し、抗菌剤の平均粒径をDa、多孔性担体の平均粒径をDb、および、抗菌層の平均厚みをTとしたとき、以下の関係を満たす。 式(1) T/Da>3.0 式(2) T/Db≦3.0 なお、Da、Db、および、Tの単位は、μmである。
