PROBLEM TO BE SOLVED: To provide a composition injectable into an affected part, sufficiently high in strength after cured and usable for filling a bone, tooth, or the like.SOLUTION: The injectable composition includes inositol phosphate treated hydroxyapatite and/or tricalcium phosphate, chitosan and water. The composition containing inositol phosphate treated hydroxyapatite or tricalcium phosphate and chitosan is injectable into the affected part by a syringe or the like, sufficiently high in strength after cured, and usable for fitting the bone, tooth, or the like. With the use of this composition, defects of PMMA (polymethylmethacrylate) are eliminated, and the composition can be injected in a low invasive manner into a transdermal affected part by the syringe, which is extremely advantageous with a small burden on a patient. Moreover, the curing time is shorter than the well-known one.
