An attachment device (1) for a connector, includes at least two clamps (2a, 2b, 3) that can attach the attachment device (1) in a removable manner to a panel (30), and a base (4) that delimits a housing (6) that can accommodate a connector (31) or a connector support (31), the attachment device (1) includes a bolt (5), whereby one of the clamps (3) is arranged on the bolt (5) and another of the clamps (2a or 2b) on the base (4), whereby the bolt (5) is able to pivot relative to the base (4) so as to bolt, via the clamp (3) of the bolt (5), the attachment device (1) to the panel (30), whereby the bolt (5) in addition is adjacent to the housing (6) such that when the connector (31) or the connector support (31) is in the housing (6), it prevents the bolt (5) from pivoting.