Extra oral sinus of odontogenic origin is rare but are well documented in medical literature. Such lesions are generally misdiagnosed with other cutaneous lesion and the mismanagement might lead to persistence of the disease. Therefore the successful treatment of the extraoral sinus tract depends on proper diagnosis. As the present case report was diagnosed as the cutaneous sinus tract of dental origin, it was well managed by non-surgical root canal treatment. Key words: Extra oral sinus, Root canal treatment, cutaneous sinus