Abstract: The connection device according to the invention comprises a first element (3) designed to be connected to the support and a second element (4) designed to be connected to the load. The second element (4) includes a tubular portion (9, 15) adapted to receive the first element (3), locking means (24) movable between locking and unlocking positions of the first and second elements (3, 4), a control ring (25) movable between a first position in which it immobilizes the locking means (24) in their locked position, and a second position in which it allows the locking means (24) to move toward their unlocked position, and a control button (42a, 42b) movable between a first position in which the control button cooperates with the tubular portion so as to immobilize the control ring (25) in its first position, and a second position in which it allows the control ring (25) to move toward its second position.