Provided is a filling/restoring material, including a photopolymerization initiator of a quaternary system formed by combining an a-diketone compound, an aliphatic amine compound, an aromatic amine compound, and a photoacid generator, in which even when the filling/restoring material is filled and cured on a cured layer of a dental adhesive material including a radical-polymerizable monomer having an acidic group, the filling/restoring material undergoes sufficient curing up to a contact interface between the filling/restoring material and the cured layer, thereby providing high adhesive strength stably. Also provided is a dental filling/restoration kit, including: a filling/restoring material (A) including: a polymerizable monomer having no acidic group (I)； a basic inorganic material (II)； and a photopolymerization initiator (III) formed by at least combining: an a-diketone compound (i)； an aliphatic amine compound (ii)； an aromatic amine compound (iii) ； and a photoacid generator (iv)； and an adhesive material (B), which is used for adhesion between a tooth and the filling/restoring material by curing the adhesive material before filling the filling/restoring material, the adhesive material including: a polymerizable monomer including a polymerizable monomer having an acidic group (I)； and a polymerization initiator (II).
