A cover element is for a recess in the upholstery of a vehicle seat, and connects to a securing part which is secured to the vehicle or to the vehicle seat and arranged within the recess in the upholstery, for the purpose of releasable, rigid attachment of an object to the vehicle seat. In particular, it can be for the ISOFIX connection of a removable child's seat. The cover element is designed as an insert which can be arranged in a removable fashion on the securing part. Furthermore, a vehicle seat having a recess in the upholstery can include an insert with an arresting mechanism to prevent unintentional complete detachment of the insert.