A retractable leash (10) comprises an internally hollow casing or frame made from metal or synthetic material, forming a handle (11) with which to grip, control and hold the leash, a winding drum (12) subjected to the action of first elastic means and wound around which is a cord or tape whose end is provided with means for fixing the cord or tape to the collar of a pet said winding drum (12) having a continuous circular surface (28) and a series of openings (30) arranged radially and defined by a series of teeth (29), also comprising a first braking mechanism (21, 23) in which a pad (23) acts by friction against said circular surface (28) of said winding drum (12) and a second blocking mechanism (25, 15, 16) in which an element (16) pushed by second elastic means (19) enters one of said openings (30) causing the rotation of said winding drum (12) to stop. The leash also comprises a control (13) provided with a manually activated pushbutton (14) subjected to the action of third elastic means (19). Said control (13) is equipped with a cursor (15) fixed to said pushbutton (14), mobile linearly between two predetermined positions, and which acts on one hand on said braking mechanism so the pressure on the pushbutton (14) determines the progressive interference of said pad (23) with said circular surface (28), and on the other on a component for the release (25, 27) of the blocking mechanism which is activated by continued pressure on said pushbutton (14), causing immediate movement of the element (16) pushed by said second elastic means inside one of said openings (30).Linvention concerne une laisse rétractable (10) comprenant un boîtier ou une structure dont lintérieur est creux et qui est composé(e) de métal ou dun matériau synthétique formant une poignée (11) permettant de saisir, de commander et de maintenir la laisse, un tambour denroulement (12) soumis à laction dun premier moyen élastique et autour duquel est enroulée une corde ou une bande dont lextrémité est d
