The present invention is a method for eliminating radioactive iodine using a hydrophilic resin that adsorbs radioactive iodine, wherein the hydrophilic resin is at least one selected from the group consisting of a hydrophilic polyurethane resin, a hydrophilic polyurea resin, and a hydrophilic polyurethane-polyurea resin and has a hydrophilic segment and, in the principal chain and/or a side chain in the structure thereof, has a tertiary amino group or has a tertiary amino group and polysiloxane segment. By means of the present invention, a novel method for eliminating radioactive iodine is provided that is simple and low-cost, furthermore does not require an energy source such as electricity, moreover can take in and stably immobilize the eliminated radioactive iodine within a solid, and is capable of reducing the volume of radioactive waste as necessary.