A device for releasably connecting a first element with a second element includes a male element connectable to one end of the first element, and a female element connectable to one end of the second element such that the male and female element pass from a disengagement condition to a mutual engagement condition. A slider activates and deactivates engagement and is engaged to the male element such to slide along the axis of insertion of the male element inside the female element. The relative motion between the activation/deactivation slider and the male element is transmitted to first removable locking members, belonging to the male element and cooperating with corresponding second locking members belonging to the female element, such to pass from a stable locking condition to a stable release condition of the male and female elements via a movement of the slider along the axis of insertion.