A roller bearing having a rotatable first ring and a non-rotatable second ring arranged concentrically, the second ring having a circumferential groove opening towards the first ring into which is arranged a protruding element, between which are arranged a single first radial roller bearing and two axial roller bearings spaced apart in the axial direction respectively on opposite radial faces of the protruding element. The roller bearing includes a plurality of circumferentially spaced apart second radial roller bearings secured to the rotatable first ring.