this study intended to investigate the clinical and electroencephalographic benign occipital epilepsy of childhood (boec) characteristics in a population sample of patients from two tertiary brazilian hospitals. we analyzed retrospectively 4912 electroencephalograms (eegs) records, and the included patients were submitted to a new clinical and eeg evaluation. were included 12 (0.92%) patients; 4 (33.3%) with criteria for early boec; 6 (50%) for late form and 2 (16.7%) with superimposed early and late onset forms. after new investigation, 2 (16.7%) had normal eeg; 4 (33.3%) had paroxysms over the occipital region; 3 (25%) over the temporal posterior regions and 3 (25%) over the posterior regions. sharp waves were the predominant change, occurring in 8 (66.6%); spike and slow wave complexes in 1 (8.3%) and sharp and slow wave complexes in 1 (8.3%). vomiting, headache and visual hallucinations were the most common ictal manifestations, presented in 100% of patients with superimposed forms. vomiting were absent in the late form and headache was present in all forms of boec.