The present invention relates to a leash for domestic animals comprising a box-shaped body (2) that houses a cord-winding pulley (3) and a handle (8) with open annular profile that ends at the free ends with rotational pins (7) inserted from opposite sides in suitable housings obtained on the sides of a basically rectangular short pipe (6) joined to said box-shaped body (2) said handle (8) is provided with a button (4) that stops and releases the pulley (3) with the interposition of suitable return means (5) said handle is composed of two basically C-shaped identical semi-parts (80) and (81), each of them ending with one of said rotational pins (7) at one end and with fast coupling and uncoupling means (M1 800, 901-902, G) at the other end (80a) and (81a).
