A device for reversibly connecting together a first element and a second element designed to be alternately connected and disconnected includes a male element inserted into a female element to move from a mutually disengaged state to a mutually engaged state and a slider for actuation/release of the engaged state, which is slidingly engaged by the male element into the female element. The relative movement of the actuation/release slider and the male element is transferred to first releasable locking members of the male element, which cooperate with corresponding second locking members of the female element to move from a stable locked state to a stable unlocked state of the male element by a movement of the slider in the direction of insertion. Furthermore, the male element includes a handle having the slider at least partially and slidingly housed therein.