A total of 80 patients with acute vertiginous attack received a bettery of audiologic and neurotologic tests, and their diagnoses were thus established. Among them, most cases of vestibular neuritis occurred in the spring, whereas acute attacks of Meniere’s disease most often took place in the autumn-winter seasons. The patients with their vertiginous attacks in the midnight were mainly the elderly, while those with attacks in the morning were usually the youth.