Radiation detector, radiation detector manufacturing method, and scintillator panel unit

A radiation detector comprising:

• a sensor panel having a light receiving surface;
• a first scintillator panel and a second scintillator panel disposed on the light receiving surface in a state of being adjacent to each other along the light receiving surface;
• and
• a moisture-proof layer disposed on the first scintillator panel and the second scintillator panel on a side opposite to the sensor panel, wherein
• the first scintillator panel has a first substrate and a first scintillator layer including a plurality of columnar crystals formed on the first substrate,
• the second scintillator panel has a second substrate and a second scintillator layer including a plurality of columnar crystals formed on the second substrate,
• the first scintillator panel is disposed on the light receiving surface in a state where the first scintillator layer is positioned on the light receiving surface side with respect to the first substrate,
• the second scintillator panel is disposed on the light receiving surface in a state where the second scintillator layer is positioned on the light receiving surface side with respect to the second substrate,
• an outer edge of the first substrate when viewed from the first scintillator layer side includes a first portion extending along the second scintillator panel, and the first scintillator layer reaches at least the first portion,
• an outer edge of the second substrate when viewed from the second scintillator layer side includes a second portion extending along the first scintillator panel, and the second scintillator layer reaches at least the second portion, and
• the moisture-proof layer is provided continuous over the first scintillator panel and the second scintillator panel.