A study on luminescence induced by Ar-ion bombardment of ion-implanted CaF2 has been conducted. Ion implantations of Eu and Tb ions in CaF2 single crystals ware carried out at fluences of 1×1014-1×1015 ions/cm2 at 100 keV at room temperature. The luminescence spectra from the Eu-implanted specimen mainly consist of two peaks: one is at ~430 nm due to Eu2+ and the other is at ~600 nm due to Eu3+. The main peak of ~545 nm owing to Tb3+ appears in Tb-implanted CaF2. The luminescence spectra from CaF2 implanted with both Eu and Tb ions mainly show three peaks at ~430, ~545 and ~600 nm, which are close to the wavelengths of the three primary colors. Ion implantations of both Eu and Tb ions result in white luminescence which is visible to the naked eye, with control of the fluences of Eu and Tb ions.