Medical education of doctors who are not specialists in vestibular disorders on the diagnosis and treatment of benign paroxysmal positional vertigo (BPPV) by supervisory doctors is essential for their proper diagnosis and treatment of BPPV in daily clinical practice. In this study, we gave lectures about BPPV to three doctors who were not specialists in vestibular disorders, and checked their medical examinations of patients with BPPV. We advised them to conduct the positional nystagmus (PN) test more than twice when there was a possibility of BPPV and they could not appreciate benign paroxysmal PN. Following this practice, they could appreciate the PN after repeating the test a second time and successfully diagnose BPPV. When they could see PN during the reverse Dix-Hallpike maneuver, but not during the Dix-Hallpike maneuver, they suspected BPPV, but could not diagnose the subtype of BPPV. When they saw downward PN during the Dix-Hallpike maneuver, they misdiagnosed affected side. Supervisory doctors have to instruct doctors who are not specialists in vestibular disorders on the characteristics of the typical PN seen in patients with BPPV, and have to check not only the clinical reports of these doctors, but also the movies of PN recorded by them.