In a radiographing apparatus, a buffer material is arranged between a support base and a side wall portion to which an incidence surface (first surface) of a casing that is positioned on an incident side of radiation R, and a back surface (second surface) of the casing that is opposite to the incidence surface are bonded, the support base is provided with a first protruding portion protruding toward the back surface, the casing is provided with a second protruding portion protruding from the back surface toward the support base, and the following relationship is satisfied:distance X<；distance Y, where a distance between the buffer material and the support base is a distance X, and a distance between the first protruding portion of the support base and the second protruding portion of the casing is a distance Y.
