Subtalar joint connects with calcaneus
Ligaments and membranes
The main ligament of the joint is the interosseous talocalcaneal ligament, a thick, strong band of two partially joined fibers that bind the talus and calcaneus.  It runs through the sinus tarsi, a canal between the articulations of the two bones.
There are four additional ligaments that form weaker connections
between the talus and calcaneus.The anterior talocalcaneal ligament (or anterior interosseous ligament) attaches at the neck of the talus on the front and lateral surfaces to the superior calcaneus.
The short band of the posterior talocalcaneal ligament extends from the lateral tubercle of the talus to the upper medial calcaneus.
The short, strong lateral talocalcaneal ligament connects from the lateral talus under the fibular facet to the lateral calcaneus, and runs parallel to the calcaneofibular ligament.
The medial talocalcaneal ligament extends from the medial tubercle of the talus to the sustentaculum tali on the medial surface of the calcaneus.A synovial membrane lines the capsule of the joint, and the joint
is wrapped in a capsule of short fibers that are continuous with the
talocalcaneonavicular and calcaneocuboid joints of the foot.