The present invention relates to a novel organic/inorganic composite, a method for producing the same, and an ultraviolet blocking agent using the same, and more specifically, it complements the drawbacks of organic ultraviolet blocking materials and inorganic ultraviolet blocking materials, The present invention relates to a novel organic/inorganic composite complex, a method for producing the same in a high yield, and an ultraviolet blocking agent using the same.本発明は、新規な有無機複合体、その製造方法及びそれを用いた紫外線遮断剤に係り、さらに具体的には、有機性紫外線遮断素材及び無機性紫外線遮断素材の欠点を互いに補完し、利点を増大させた新規な有無機複合体、それを高い収率で製造する方法、及びそれを用いた紫外線遮断剤に関する。