This chapter discusses functional and anatomy of joints. The joint is a structural component of the skeleton where two or more skeletal elements meet including the supporting structures within and surrounding it. The joints are broadly classified into three categories. Types of joints are Fibrous joints, cartilaginous joints, and synovial joints, are briefly discussed in this chapter. Synarthroses include all those articulations in which the surfaces of the bones are in almost direct contact, fastened together by intervening connective tissue, and in which there is no appreciable motion as in the joints between the bones of the skull, excepting those of the mandible. In the Cartilaginous Joints cartilage directly unites one bony structure to another (bone—cartilage-bone). Synovial membrane differentiates from the mesenchymal tissue around articular disk, clearing the articular surface by the fifth month in utero. Synovial tissue may be fatty, fibrofatty or fibrous and contains types I and III collagen.