Catalan Abstract: L’activitat dels lobbys i la seva compatibilitat amb el sistema democratic ha estat objecte de consideracio des de fa decades, particularment als paisos de common law que han estat els primers en regular-la. Tot i haver-se proposat diverses vegades, no ha estat fins a desembre 2014 que s’ha aprovat a Espanya la primera regulacio, que te abast autonomic ates que ho ha fet el Parlament de Catalunya per Llei 19/2014. Es tracta d’un pas positiu per donar a coneixer i controlar la influencia privada en les decisions publiques, per be que a partir de l’aplicacio de la regulacio caldra anar millorant-la per tal que guanyi en efectivitat. English Abstract: The activity of lobbies, and their compatibility with a democratic system, has been the subject of consideration for decades, particularly in common law countries, which were the first to regulate it. Despite having been proposed on various occasions, it was not until December 2014 that the first regulation was approved in Spain. This has a regional scope because it was the Catalan Parliament that introduced it with Act 19/2014. It marks a positive step towards revealing and controlling private interest in public decisions, although, in the course of its application, it will gradually have to be improved to make it more effective.