An implant composite material is provided which is for use in the treatment of articular cartilage disorders such as hip joint femur head necrosis and knee joint bone head necrosis, the reconstruction/fixing of a bio-derived or artificial ligament or tendon, the uniting/fixing of a bone, etc. Part of the implant composite material is replaced by bone tissues in an early stage to enable the material to stably bond with a living bone, while the other part retains a necessary strength over a necessary time period. Finally, the implant composite material is wholly replaced by the living bone and disappears. It is an implant composite material having a constitution which comprises a compact composite of a biodegradable and bioabsorbable polymer containing bioabsorbable and bioactive bioceramic particles and a porous composite of a biodegradable and bioabsorbable polymer containing bioabsorbable and bioactive bioceramic particles, the porous composite being united with the compact composite. The porous composite is replaced by bone tissues in an early stage to enable the material to stably bond with a living bone, while the compact composite retains a necessary strength over a necessary time period. Finally, the material is wholly replaced by the living bone and disappears. Consequently, this implant composite material can sufficiently meet desires in this medical field.