PURPOSE: To provide the subject composition containing a far infrared radiation radiating material as an active component, repeating the radiation by the absorption of the body heat in the far infrared radiation radiating material, activating the molecular vibration, decomposing various bacteria and enzymes, suppressing the deposition of bacterial plaque and removing the plaque.

CONSTITUTION: The objective composition contains a far infrared radiation radiating material. Various kinds of substances capable of radiating far infrared radiation can be used as the far infrared radiation radiating material. Especially, the use of substance capable of radiating the most effective far infrared radiation by the body heat is preferable. Concrete examples of the substance are alumina, zirconia, magnesia or other oxide ceramics such as magnesia ceramic 'KSS600' produced by Kyoritsu Ceramic Co. The amount of the substance in the composition is 10-50wt.%, preferably about 50wt.%. The substance is usually used in powdery form having particle diameter of usually 0.5-30μm, preferably 1-3μm.