PROBLEM TO BE SOLVED: To provide a basket-like or sheet-like biomaterial with high dynamic strength and high flexibility.SOLUTION: This bone prosthesis includes: a biomaterial made by knitting a belt-like molding comprising collagen and/or a belt-like molding comprising a calcium phosphate/collagen complex, in basket or sheet shape and a solid and/or paste-like filler. Alternatively, the bone prosthesis includes: a biomaterial made by knitting a belt-like molding having a collagen layer and a calcium phosphate/collagen complex layer, in basket or sheet shape and a solid and/or paste-like filler.