Transverse Tarsal Joint (Chopart's Joint)
From WikiMSK
The transverse tarsal joint or midtarsal joint or Chopart's joint is formed by the articulation of the calcaneus with the cuboid (the calcaneocuboid joint), and the articulation of the talus with the navicular (the talocalcaneonavicular joint).
The transverse tarsal joint is considered to be part of the same functional unit as the subtalar joint because they share a common axis of rotation with contribution to inversion and eversion of the foot.