Abstract: A lightning protective device for a ground based mobile radar antennas of the type which moves round a vertical axis. The device includes: an electrically conductive rod, located near the antenna which is placed outside the transmission and reception sector of the antenna. A first or top end of the rod is higher than the antenna. An electrically insulating rigid support connects the rod and the antenna and transfers rotation of the antenna to the rod, thus keeping the rod outside the transmission and reception sector of the antenna. A fixed electrically conductive circular rail is placed below and around the antenna, and several electrically conductive elements are connected to the rod to the rail, and to the insulating rigid support so as to rotate with the antenna and the rod, and include an electrically conductive skid which rubs against the circular rail, thus providing for an electrical contact between the rotatiing rod and the rail which is connected to ground.