The cuboid bone (Latin: os cuboideum) is a tarsal bone of the foot and is located most laterally in the distal part of the tarsus. It articulates with four bones: the calcaneus and lateral cuneiform bone, and with the fourth and fifth metatarsal bones.
The cuboid bone has six surfaces, with three of them being articular surfaces.
The dorsal surface of the cuboid bone is for the attachment of ligaments.
The plantar surface has a deep groove (peroneal sulcus), which lodges the tendon of the peroneus longus muscle.
The lateral surface of the cuboid bone has a deep notch formed by the beginning of the perineal sulcus.
The posterior surface articulates with the calcaneus.
The anterior surface articulates with the fourth and fifth metatarsal bones.
Finally, the medial surface of the cuboid bone articulates with the lateral cuneiform bone.