A support for a portable electronic apparatus. The support includes a first edge and a second edge, a locking device movable between a locking position, in which it prevents the translation of the first edge relative to the second edge, and an unlocking position, and an actuating device for actuating the locking device movable between an inactive position and an active position in which the actuating device keeps the locking device in its unlocking position. Movement of the second edge from an idle position to a maintaining position drives the actuating device from its active position to its inactive position. The support includes a control device that, when moved from a released position to a disengagement position, causes the actuating device to go from its inactive position to its active position while keeping the second edge in its maintaining position.