A radiation detector including: a substrate including a sensor portion layer on a pixel area of a flexible substrate, the sensor portion layer having a plurality of pixels that accumulate charges generated according to light converted from radiation； conversion A layer provided on the surface of the substrate on which the pixel area is provided and converting the radiation into light； and a fixing member provided on the substrate side of the conversion layer and fixing the sensor portion layer On the substrate.一種放射線檢測器，其具備：基板，在可撓性基材的像素區域上包括感測器部層，該感測器部層具有蓄積根據從放射線轉換之光產生之電荷之複數個像素；轉換層，設置於該基材的設置有該像素區域之面側，且將該放射線轉換為光；及固定構件，設置於比該轉換層更靠該基板側，且將該感測器部層固定於該基材。
