An allergen depressant having well allergen depressability, heat resistance, and chemical resistance capable of depressing coloring and improving processability, and having a compound as a main component is provided. The compound contains, in a frame, a divalent molecular structure represented by following formula (1).提供一種具有過敏原降低功能,耐熱性、耐化學品性良好,且可抑制著色,可使加工性提高之以於骨架中具有下述式(1)所表示之2價分子結構之化合物為有效成分的過敏原降低劑。