Objective: It was aimed to investigate the changes insleep quality of patients who have the diagnosis BipolarDisorder during the COVID-19 pandemic process and itsrelation with the time spent at home, and to determinethe effects of the process on patients by investigatingthe changes in patients' weight, the amount of smokingand alcohol use. Method: The files of patients whohave been regularly followed up for at least 1 year withthe diagnosis of Bipolar Disorder at the CommunityMental Health Center were examined. Patients who metworking criteria and patients whose data for thePittsburg Sleep Quality Index, Young Mania Rating Scale,and Hamilton Depression Rating Scale, which wereapplied within 3 months before the start of social isola tion measures and at least 2 months after this date wascomplete in their file, were included in the study.Results: 42 patients aged between 21 and 60 wereincluded in the study. It was found that subscales of PUKIexcept the "sleep time" and "habitual sleep efficacy" andthe general sleep quality were significantly impaired dur ing the pandemic process, but this impairement was notrelated to the number of days spent at home. It wasdetermined that 52.4% of our patients put on weight,7.1% of smokers increased smoking, and there was nosignificant change in depression and mania scale scores.Discussion: Although they were in remission period, thesleep quality of the patients was negatively affected.These findings indicates the importance of CommunityMental Health Center services.