Maintenance practices in paper mills are critical for ensuring operational efficiency, minimizing downtime, and optimizing production output. This chapter explores various aspects of maintenance in the context of paper manufacturing facilities, focusing on preventive, predictive, and corrective maintenance strategies. The study emphasizes the importance of proactive maintenance routines in preventing equipment failures and reducing the likelihood of unplanned shutdowns. Key factors such as equipment reliability, maintenance scheduling, and the use of advanced technologies like predictive analytics and condition monitoring are discussed. Industry examples illustrate successful maintenance strategies adopted by leading paper mills, highlighting best practices and lessons learned. Overall, this study sets the stage for a comprehensive exploration of maintenance practices crucial to the smooth operation of paper mills in today's competitive industrial landscape.