An adhesive composition for dental use exhibiting acidic property, which includes a mixture of a polymerizable monomer component containing a polymerizable monomer having an acidic group derived from phosphoric acid, a multivalent metal ion-releasing component, water and fumed silica; wherein - said multivalent metal ion-releasing component 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 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 contains not less than 5 mass% of the polymerizable monomer having an acidic group derived from phosphoric acid; - said water is contained in an amount of 3 to 150 mass parts per 100 mass parts of the polymerizable monomer component; and - said fumed silica is contained in an amount of 0.5 to 20 mass parts per 100 mass parts of the polymerizable monomer component; - characterized in that the metal ions stemming from said component 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 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 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 contains not less than 5 mass% of the polymerizable monomer having an acidic group derived from phosphoric acid; - said water is contained in an amount of 3 to 150 mass parts per 100 mass parts of the polymerizable monomer component; and - said fumed silica is contained in an amount of 0.5 to 20 mass parts per 100 mass parts of the polymerizable monomer component; - characterized in that the metal ions stemming from said component 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.