An apatite/collagen composite powder absorbed and replaced by autogenous bone in the living body, a formable-to-any-shape artificial bone paste comprising an apatite/collagen composite powder and a binder, a method for producing an apatite/collagen composite powder by turning a suspension containing a fibrous apatite/collagen composite to liquid drops and rapidly cooling them, and a method for producing an apatite/collagen composite powder by granulating a blend comprising a fibrous apatite/collagen composite.
