This thesis explores the morality of film and its impact on the formation of conscience, with a particular emphasis on the moral-theological perspective of the Catholic Church. The work is divided into two main sections. The first section is dedicated to understanding the concept of conscience. It analyzes the perception of conscience across different cultural and civilizational contexts, highlighting its universal presence in human experience. Following this, the theological doctrine of conscience is presented, explaining the fundamental concepts and principles by which it operates, with a particular analysis of this process. Emphasis is placed on the individual's obligation to properly form their conscience. The second section examines the morality of movies through a historical overview in the United States, including perspectives from both civil society and believers. It then provides a theological evaluation of the influence of film on morality and the formation of conscience, drawing on significant Catholic Church documents that address media and film. The thesis concludes with a reflection on the principle of integral good as applied to movies. This study aims to demonstrate the importance of proper conscience formation and to analyze the extent to which film influences this formation and the moral orientation of individuals and society. The conclusion highlights the significant impact of movies on the perception of morality and the formation of conscience. It calls on individuals to take responsibility and care in shaping their conscience by being mindful of the content they consume, especially during leisure time.