Non-solvent-type adhesive composition for dental use

The present invention provides a non-solvent-type adhesive composition for dental use, which has high initial adhesion force, high adhesion durability and a high dentin cohesive failure rate to a tooth substance (wet body) and does not substantially contain water or an organic solvent. The present invention relates to a non-solvent-type adhesive composition for dental use, which contains (A) a polymerizable monomer containing an acidic group, (B) a hydrophobic polymerizable monomer containing no acidic group, and (C) a water-soluble photopolymerization initiator having a solubility in water of 10 g/L or more at 25°C.