The stimulable phosphor panel includes a rigid substrate, a stimulable
phosphor layer formed on the rigid substrate and a transparent
moisture-resistant protective layer formed on the stimulable phosphor
layer. The stimulable phosphor layer is housed and sealed in an airtight
area formed between the rigid substrate and the transparent
moisture-resistant protective layer. The panel further includes a buffer
space communicating with the airtight area capable of
expansion/contraction. The buffer space is defined by a recess formed in
the substrate, a ventilation hole connecting the recess with the airtight
area and being formed in the substrate, and a flexible sheet covering an
opening of the recess. Or, the buffer space has a volume variable within
a range from 1/10 to twice of a sum of a spatial volume of the airtight
area and a volume of the buffer space at 1 atm.