A radiation detection device includes: a radiation detection panel; a support member that supports the radiation detection panel; and a housing in which the radiation detection panel and the support member are housed, the housing includes a first housing portion, a second housing portion that supports the support member, and an intermediate member that is disposed between the first housing portion and the second housing portion and that has lower rigidity than the first housing portion, and a peripheral portion of the housing is formed by the first housing portion.