Joint implant (1) comprising an upper and a lower implant part (2, 3), which are connected to each other by at least one joint, wherein a top side of the upper implant part and a bottom side of the lower implant part can be placed against bones to be connected to each other in an articulated manner and supported, wherein the upper and/or the lower implant parts each comprise a portion of the joint region providing the joint, and wherein a connecting means (4) is provided which connects the upper and lower implant parts to each other to form a combined assembly, while enabling movement of the joint. Each of the upper and/or lower implant parts comprises a contact part (5, 8) which faces the respective bone and can be attached thereto and which provides the top or bottom side of the implant, and further comprises a joint part (6, 9) which can be attached to the contact part and comprises the joint region of the implant part. As an alternative, or in addition, the connecting means (4) extends substantially parallel to the longitudinal axis of the implant and is mounted in a holder (26, 27) of the joint region of the upper and/or lower implant parts, said holder being open on the side facing the bone, wherein the holder can be covered at least partially or at least substantially fully by a cover element which can be displaced transversely to the longitudinal axis of the implant.
