A joint unit of a control arm of a wheel suspension in a motor vehicle, with a housing (1) and a pivot (2), which is mounted slidingly in the housing by a spheroidal bearing surface (3). The joint unit has a catching device (4) to avoid complete separation of the housing (1) from the pivot (2). The catching device spans over part of the housing (1) in a contactless manner during normal operation. The catching device (4) has at least one flexible catching band or at least one securing strap (4.1, 4.2) with a recess (4.1.1, 4.2.1), into which protrudes a catching pin (1.1, 1.2) of the housing in a contactless manner during normal operation, or at least two securing straps (4.1 and 4.2).