The present invention relates to a physiologically active substance delivery body, which includes a physiologically active substance, and porous silica particles carrying the physiologically active substance and having a plurality of pores having a diameter of 5 nm to 100 nm. The present invention relates to a physiologically active substance delivery body capable of parenterally administering various drugs by sustained release of all of them in a supported amount. [Selection diagram] FIG.本発明は、生理活性物質送達体に関し、生理活性物質と、該生理活性物質を担持し、直径５ｎｍ～１００ｎｍの複数の気孔を有する多孔性シリカ粒子とを含み、前記多孔性シリカ粒子は、特定の物性を有するものであり、様々な薬物を、担持された量だけ全て徐放的に送達することができ、非経口投与が可能な生理活性物質送達体に関する。【選択図】図８
