The intra-articular ligament of head of rib[1] is a ligament of the articulation of head of rib[3] situated within the joint capsule.

[3][2] It takes the shape of a short, flat band.

[4] It joins the crest of head of rib (between the superior costal articular facet and inferior costal articular facet[4][2] - thus dividing the joint cavity into two compartments[4]), and the intervertebral disc.

[3][2][4][5] It is absent in ribs I and X-XII.

[4]