Being the adhesive composition for one component type dentistry which also possesses the pH of 3 high, (a) polymerization characteristic acrylate monomer or prepolymer, (b) the optical initiator, and (the adhesive composition for dentistry which includes the solvent which contains c) t butanol.高くとも3のpHを有する一成分系歯科用接着剤組成物であって、(a)重合性アクリレートモノマー又はプレポリマー、(b)光開始剤、及び(c)t-ブタノールを含有する溶媒を含む歯科用接着剤組成物。