To provide a heat developable sensitive material packaged body capable of suppressing pressure fog due to the weight of the sensitive materials in the packaged state.

In the heat developable sensitive material packaged body obtained by stacking and packaging plural sheetlike heat developable sensitive materials each containing an organic silver salt, photosensitive silver halide, a reducing agent for silver ions and a binder on the base in a packaging bag 3, (1) the lowest one of the stacked heat developable sensitive materials 1 receives ≤300 Pa surface pressure, (2) a sheet which protects at least the undersurface of the stacked heat developable sensitive materials is disposed and the bending stiffness of the sheet measured by a method stipulated by JIS P 8125 is ≥4 mNm or (3) the lowest one of the stacked heat developable sensitive materials receives ≤300 Pa surface pressure, a sheet which protects at least the undersurface of the stacked heat developable sensitive materials is disposed and the bending stiffness of the sheet measured by a method stipulated by JIS P 8125 is ≥4 mNm. The packaging bag 3 has light shielding and moisture- proof properties.