From 111 patients with parkinsonism there were found twenty presenting oculogiric crisis corresponding to a 18% frequency. From these twenty patients 14 were male and 6 female, the starting age of the Parkinson's syndrome varying from 10 to 40 years. Only one patient presented the oculogiric crises as the initial sign. In 83% of the cases the vertical upward direction was observed, the convergence impairment and the diplopia being the other more frequent associated ocular signs. Statistically there was no difference of incidence of the oculogiric crisis in the unilateral or bilateral parkinsonism. Encephalitis was the most frequent etiology.