The invention relates to a portable device for video electroencephalography (100), said device (100) comprising a central portion (110) to which a plurality of arcuate arms (120, 130, 140, 150, 160, 170, 180, 190) are directly or indirectly connected in a movable manner, wherein said arms together define a helmet structure adapted to be worn on the head of a patient, wherein each of said arms (120, 130, 140, 150, 160, 170, 80, 190) is configured to allow mounting of one or more electrodes (200) of the device (100) and wherein said electrodes (200) are connected to an electronic central unit (300) mounted on said helmet structure. The device further comprises at least one supporting member (400) and at least one video camera (500) mounted on said supporting member (400) so as to face the helmet structure, said video camera (500) being connected to said electronic central unit (300). The arms comprise a first arm (120) and a second arm (130) which extend away from each other in a longitudinal direction (L), as well as a third arm (140) and a fourth arm (150) which extend away from each other in a front direction (F), said first and second arms (120, 130) being pivoted on said central portion (110) about respective axes parallel to said front direction (F), and said third and fourth arms (140, 150) being pivoted about respective axes parallel to said longitudinal direction (L).
