Collar for pets, preferably dogs, being a collar (1) of the type of those having the flexible body and having means for adjusting the diameter in the neck of the animal, characterized in that it comprises at least one compartment (2) of storage located in the body of the collar (1), and further comprises an automatic collection system (4) of a belt (3) that is housed inside the body of the collar (1). (Machine-translation by Google Translate, not legally binding)1. Collar para mascotas, preferentemente perros, siendo un collar (1) del tipo de los que tienen el cuerpo flexible y que disponen de medios para el ajuste del diámetro en el cuello del animal, que se caracteriza porque comprende al menos un compartimento (2) de almacenaje ubicado en el cuerpo del collar (1), y comprende además un sistema de recogida automática (4) de una correa (3) que queda albergada dentro del cuerpo del collar (1).