Propolis is a lipid complex substance that honeybees produce by mixing what they collect from flowers, leaves, or buds with their own salivary gland secretion and it has various kinds of effects enough to draw attention. Various kinds of researches on Propolis have been conducted and especially, turned it out that Propolis has lots of effects at dental caries. However, studies on effects upon discolored teeth and dental bleaching were not made. This study examined the effects of propolis upon teeth discoloration through the clinical trial of injection the subjects who want discolored teeth and dental bleaching treatment with Propolis three times a day. As a result, it was found to work on changing the teeth into discolored teeth and dental bleaching. The author hopes that further studies on the basis of this study will make steady progress.