Provided are a porous composite containing OCP and collagen having higher compressive strength than before: a bone regeneration material containing the same: and a method for producing a porous composite. The porous composite contains octacalcium phosphate and collagen, has a pore size of 5 to 40 μm as determined by measurement using a mercury porosimeter, and contains pores of 71 to 200 μm at a rate of less than or equal to 8% in all pores of less than or equal to 200 μm.