The present invention relates to the cosmetic use, as an agent for treating greasy skin and/or preventing greasy or greasy-prone skin and/or the associated aesthetic skin defects, of an essential oil of Origanum majorana and/or of origanum hybrids. The invention also relates to a cosmetic composition comprising same, to a non-therapeutic cosmetic care and/or cleansing treatment process for greasy skin, and also to said essential oil as a dermatological agent.
