A porous composite body, a bone regeneration material, and a manufacturing method for the porous composite body are disclosed. The porous composite body has compressive strength greater than those of conventional skills and contains octacalcium phosphate (OCP) and collagen, and the bone regeneration material contains the porous composite body. This invention relates to a porous composite body containing octacalcium phosphate and collagen, of which the diameter of pore is in the range of 5~40[mu]m with the measurement using a mercury porosimeter. Relative to all the pores with diameters less than 200[mu]m, the proportion of the pores with diameters less than 71~200[mu]m is less than 8%.本發明提供壓縮強度較以往優異且含有OCP與膠原之多孔質複合體、含有多孔質複合體之骨頭再生材料、以及多孔質複合體的製造方法。本發明係一種多孔質複合體，係含有第8磷酸鈣與膠原，以水銀孔隙計測定之氣孔徑為5~40μm，200μm以下之氣孔全體中71~200μm之氣孔比例為8%以下。
