An adhesive composition for dental use exhibiting acidic property, which includes a mixture of a polymerizable monomer component (A) containing a polymerizable monomer having an acidic group derived from phosphoric acid, a multivalent metal ion-releasing component (B), water (C) and fumed silica (D); wherein - said multivalent metal ion-releasing component (B) is capable of releasing at least metal ions having a valency of 3 and selected from rare earth metal ions and aluminum family metal ions, and wherein said component (B) is: (i) a rare-earth-metal- or aluminum-family-metal-ion-eluting filler; (ii) a carbonate of an acid and a rare earth metal or aluminum family metal; (iii) a lower alkoxide of a rare earth metal or aluminum family metal having not more than 4 carbon atoms; or (iv) a hydroxide of a rare earth metal or aluminum family metal; - said polymerizable monomer component (A) contains not less than 5 mass% of the polymerizable monomer having an acidic group derived from phosphoric acid; - said water (C) is contained in an amount of 3 to 150 mass parts per 100 mass parts of the polymerizable monomer component (A); and - said fumed silica (D) is contained in an amount of 0.5 to 20 mass parts per 100 mass parts of the polymerizable monomer component (A); - characterized in that the metal ions stemming from said component (B) are present together with the polymerizable monomer having an acidic group derived from phosphoric acid in such an amount that a total valency ratio (R E ) defined by the following formula is in a range of 0.2 to 3.0 in said composition; R E = TV E / TV A wherein TV E is a total valency of the metal ions contained in said composition, and TV A is a total valency of the acidic groups of the polymerizable monomer having an acidic group derived from phosphoric acid contained in said composition. - said multivalent metal ion-releasing component (B) is capable of releasing at least metal ions having a valency of 3 and selected from rare earth metal ions and aluminum family metal ions, and wherein said component (B) is: (i) a rare-earth-metal- or aluminum-family-metal-ion-eluting filler; (ii) a carbonate of an acid and a rare earth metal or aluminum family metal; (iii) a lower alkoxide of a rare earth metal or aluminum family metal having not more than 4 carbon atoms; or (iv) a hydroxide of a rare earth metal or aluminum family metal; - said polymerizable monomer component (A) contains not less than 5 mass% of the polymerizable monomer having an acidic group derived from phosphoric acid; - said water (C) is contained in an amount of 3 to 150 mass parts per 100 mass parts of the polymerizable monomer component (A); and - said fumed silica (D) is contained in an amount of 0.5 to 20 mass parts per 100 mass parts of the polymerizable monomer component (A); - characterized in that the metal ions stemming from said component (B) are present together with the polymerizable monomer having an acidic group derived from phosphoric acid in such an amount that a total valency ratio (R E ) defined by the following formula is in a range of 0.2 to 3.0 in said composition; R E = TV E / TV A wherein TV E is a total valency of the metal ions contained in said composition, and TV A is a total valency of the acidic groups of the polymerizable monomer having an acidic group derived from phosphoric acid contained in said composition. TV E is a total valency of the metal ions contained in said composition, and TV A is a total valency of the acidic groups of the polymerizable monomer having an acidic group derived from phosphoric acid contained in said composition. <EOS>