The composition and usage for dentistry are stated in this bill. The adhesive composition for dentistry which is stated in this bill, the polymerization characteristic organic component (namely, has the ethylene characteristic unsaturated part) abundantly to include the hardenable component which is included, the repetition unit which includes the polar group or the amount polar group and the repetition unit which includes the hydrophobic hydrocarbon radical are included, for example (, water detachability) the polymer the small quantity is included.歯科用組成物及び使用方法が本明細書に記載される。本明細書に記載される歯科用接着剤組成物は、重合性有機成分(即ち、エチレン性不飽和部分を有する)を含む硬化性成分を多量に含み、極性基又は分極性基を含む繰り返し単位及び疎水性炭化水素基を含む繰り返し単位を含む(例えば、水分散性)ポリマーを少量含む。