Abstract: A pipe coupling, e.g. for use in irrigation pipelines, having releasably connectable male and female coupling coupling elements which are connected so as to be able to swing relative to each other about either or both of two axes extending transversely of the coupling elements and perpendicular to each other, whereby the elements are free to undergo universal relative angular movement when attached together. For this purpose one element is encircled by a loosely fitting ring, pivotally connected to that element by lugs at two diametrically opposite positions, and the other element has a pair of hooks, at diametrically opposite positions, which releasably engage sockets on the ring which lie on a diameter of the ring perpendicular to a diameter on which the lugs lie. The lugs may engage a pair of diametrically opposite seats on the one element, or an annular track in which case the couple elements are free to undergo relative rotation as well as relative angular movement.