The invention relates to an electrophysiological measurement device (2) for the head of an animal, said device comprising a helmet that can be arranged on the head of said animal and comprises electrophysiological measuring means. According to the invention, said helmet comprises a first and a second strap (212, 211) to be placed around the head of said animal, respectively in front of and behind the ears (12) of said animal (1), said first and second straps (212, 211) being connected by a third and a fourth strap (207, 208) to be placed respectively beneath each ear of said animal.