Sound localization performance of blindfolded sighted subjects has been investigated by recording event-related potentials, ERP, and we found that some ERP components reflect the distance between two sound sources (Tauchi et al., 2003 SFN). Since some of the vision impaired persons are known to develop ability such as echolocation, it could be interesting to study their performance of sound localization. In this study, we assessed sound localization of vision impaired persons by measuring ERP and compared with that of sighted. The method used was the same as before. The white noise pulse was emitted frequently from one speaker located in front of the subject (non-target stimulation), and the same sound was emitted less frequently from another speaker located various distances from the front speaker (target stimulation). Four vision impaired persons participated; two totally blind, one early-blind and one late-blind, and two low vision, one with higher visual acuity and one lower acuity. Difference waves ob...