[problem] lightweight and can be portable, and is a low cost, to provide a radiation shielding cardboard shelter to effectively protect the evacuation weak from radiation damage the structure of paper made from the liner 8, 12 is a paper core 9 and a flat plate-like in the manufactured paper with A waveform of the cross-sectional shape, substrate 10 and the metal powder is blended radiation shielding sheet structure 31 in the waveform section including the coating film 20 is adhered, the further manufactured paper liner 14 outwardly (or, the structure of the second sheet) is bonded, the metal powder during paper stock radiation shielding structure comprising a has a structure in which sandwichedFIELD 2
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