PROBLEM TO BE SOLVED: To provide a soil coating agent which can reduce a radiation dose, is easily applied, has no harmful effect to an environment, and can be used in cultivation as it is.SOLUTION: A coating agent for radioactive material contaminated soil includes two or more kinds selected from a group consisting of clay material, humic soil material and radiation shielding material. The agent can be easily applied to soil contaminated with radioactive material, covers the contaminated soil, absorbs the radioactive material, shields radioactivity, suppresses the influence to an environment due to the radioactivity, and enables cultivation of plants.
