A chain joint for link chains, having a main body in the form of an oval chain link with two mutually parallel longitudinal legs which are connected to one another at their ends via a rounded link portion, one defining a receiving opening for receiving chain links. The receiving opening is bounded at its ends by one longitudinal leg section, wherein, in the longitudinal leg, a threaded bore runs in the longitudinal direction and extends in both longitudinal leg sections. A closure screw engages the threaded bore in both longitudinal leg sections, so that, while maintaining the predefined sizes for outer circumference and link width of the main body, the main body, in the region of its longitudinal legs, includes a profile cross section that is larger than the profile cross section in the region of its rounded link portions.