The authors examined visual evoked potentials using the method of the visual full field stimulation hemi-field, using a check-board patterned structural stimulus in 69 patients with the diagnosis of vascular headache. The peak latencies of the waves did not differ significantly in the group of patients with vascular cephalea, as compared with the control group; this applies to both ways of stimulation. The es amplitudes of waves (P1 = P100 and N2) were significantly higher in the group with vascular cephalea after stimulation by the visual field. Of half the visual field stimulation did not reveal statistically significant differences in the latencies waves. The results may indicate an increased electrophysiological activity of the visual system in the interparoxysmal period in patients with vascular cephalea.