Fibrous joints are immovable and they occur in bones which are connected by dense connective tissue, consisting mainly of collagen.

The fibrous joints are divided into three types:

• Sutures are found between bones of the skull. In fetal skulls the sutures are wide to allow slight movement during birth. They later become rigid (synarthrodial).
• Syndesmosis are found between long bones of the body, such as the radius and ulna in forearm and the inferior tibio-fibular joint in leg. Unlike other fibrous joints, syndesmoses are moveable (amphiarthrodial).
• Gomphosis is a peg and socket joint between the root of a tooth and the sockets in the maxilla or mandible.