Baldomero Sanín Cano's prolific work includes a group of articles that refers to the cinema. Those articles, written over a period of three decades, are not only a reflection on cinema's development but also on the evolution of Sanin Cano's ideas about that new art form. This text intends to analyze the essays on the topic and make it possible to identify Sanín Cano as a film critic through his analysis of problems such as the classification of the arts, their limits and relationships, and the aesthetic conception from an historical context.