The invention concerned relates to an articulated coupling particularly for adjusting the jet inclination of irrigators in general, comprising two curved or straight consecutive tubular members in constant direct communication with each other, which, at their facing contacting mouths, comprise profiled ends arranged to enable them to be mutually adjusted angularly about a diametrical axis of articulation; seal means disposed on the inside of said mouths and arranged to automatically adapt to said adjustment; an adjustment device for said two tubular members, the control member of which lies in the mutual swivel plane of these latter; and a guide and connecting clamp for the tubular members, the longitudinal axis of which coincides with the axis of articulation of the coupling.