To obtain the subject composition good in adhesion to human hard tissue, excellent in strength at marginal region and good in biocompatibility by allowing bisphenoxyethanolfluoroorange (meth)acrylate to be included in the composition.

This composition includes (A) at least one kind of the compound of the formula (R is H or CH3). The composition preferably includes (B) a bifunctional aromatic (meth)acrylate, (C) a bifunctional aliphatic (meth)acrylate and (D) a trifunctional aliphatic (meth)acrylate besides the component A. The mixing ratio of each component is 10-80 pts.wt. component A, 0-60 pts.wt. component B, and 5-50 pts.wt. component C, with the proviso that the total of the components A to C is 100 pts.wt. Preferably, the component D in a proportion of 1-50 pts.wt. based on 100 pts.wt. total of the components A to C is preferably used therewith. A biomedical hard tissue such as a bone and a tooth can be expected to be restored sufficiently by using the composition.