The　three-dimensional　(3-D)　carbon　fiber　fabric　is　used　to　reinforce　a　hydroxyapatite　(HA)/epoxy　biocomposite.　The　elastic　modulus　calculation　of　the　3-D　fabric　reinforced　composite　by　the　stiffness　average　method　and　the　finite　element　method　shows　that　the　elastic　modulus　of　the　composite　is　designable,　and　can　be　adjusted　to　the　range　of　a　human　cortical　bone　(7-30　GPa)　by　varying　the　micro-structural　parameters　of　the　woven　fabric　to　fulfill　the　nonisotropic　requirement　of　the　composite　implants.　The　calculated　elastic　modulus　is　comparable　with　the　flexural　modulus　of　the　3-D　fabric　reinforced　composites　prepared　by　resin　transfer　molding.　The　incorporation　of　HA　has　decreased　the　flexural　modulus　of　the　composites　for　the　weakened　fiber-matrix　interface,　but　the　flexural　modulus　(22-36　GPa)　is　still　close　to　that　of　the　human　cortical　bone,　which　favors　the　avoidance　of　＇stress　shielding＇　and　the　sequent　bone　absorption　caused　by　implant　materials　with　a　high　elastic　modulus.　(c)　2006　Elsevier　B.V　All　rights　reserved.