A livestock stanchion with an improved support yoke including at least one releaseable support yoke comprising a mounting member fixed to and projecting upward from a horizontal rail. A support space formed in an upper end of each mounting member supports a locking bar. A removable pin for a support yoke crosses the upper region of a support space to prevent dislodging of the locking bar. The mounting member can be a plate or have a generally “V,” “U,” “H,” circular, arcuate or poloygonal shaped cross section.