A method for producing a bone regeneration material containing an octacalcium phosphate-gelatin complex, the method including: co-precipitating octacalcium phosphate with gelatin to produce an octacalcium phosphate-gelatin co-precipitate; washing the co-precipitate with a washing liquid to remove gelatin from the co-precipitate, thereby obtaining an octacalcium phosphate slurry; dispersing the octacalcium phosphate slurry or dry granules formed using the slurry in an aqueous gelatin solution; and drying the dispersion of octacalcium phosphate dispersed in the aqueous gelatin solution to produce an octacalcium phosphate-gelatin complex.