Abstract: A flexible joint for deep-sea oil installations.This joint combines the two parts of a swivel joint, consisting of a spherical ring-shaped male adapter and a spherical ring-shaped female adapter, by using means of connection comprising a plurality of identical resilient devices, positioned in even numbers in two crowns, the far ends of these devices resting on two ring-shaped end-plates, the upper end-plate being integral and coaxial with the male adapter, and the lower end-plate being connected to the upper end-plate by a system that also attaches it coaxially to the male adapter, and the close ends of the resilient devices resting, by means of thrust-plates, either on one of two opposed shoulders associated to the male adapter, equidistant from the end-plates on which the far ends of the two crowns rest, or on one face of a ring-shaped flange integral and coaxial with the female adapter.Prestressing of the resilient devices makes this joint particularly suitable for use with riser pipes.