The present invention provides a non-solvent dental adhesive compositionexhibiting high initial bond strength and high bond durability to a toothstructure(wet matter) and a high dentin cohesive failure rate on a tooth structure (wetmatter) and being substantially free of water and an organic solvent. Thepresentinvention relates to a non-solvent dental adhesive composition comprising: anacidgroup-containing polymerizable monomer (A)； a hydrophobic polymerizablemonomer (B) having no acid group； and a watersoluble photopolymerizationinitiator (C) having a solubility of 10 g/L or more in water at 25°C.
