Background: The implementation of the Covid 19 protocol is a form of government effort in order to prevent or break the chain of transmission of Covid 19. The government, especially the Indonesian Ministry of Health is trying to optimize the implementation of the Covid 19 protocol by considering various joints and areas of community life, both social, economic, cultural and religious. The Indonesian Ministry of Health has established the Covid 19 protocol, especially for places of worship, such as mosques for holding congregational prayers. The implementation and application of the Covid 19 protocol at the mosque received various responses from both the administrators and the congregation of the mosque, this can be influenced by various factors such as the level of knowledge, attitude and behaviorObjectives: Research To find out concrete information regarding the implementation and level of compliance with the Covid 19 protocol to the factors that can affect congregational prayers at several mosques in the Semarang Pedurungan Region, deeper observation and study is needed.Methods: The research used is descriptive, qualitative observational using a cross-sectional research design. Primary data collection in the form of observational data on the implementation of the Covid 19 protocol during congregational prayers, questionnaires and interviews with mosque administrators regarding the management and implementation of the Covid 19 protocol which were carried out during congregational prayers that were not concurrent at several Pedurungan Semarang Regional Mosques in April until June 2022. The information and data obtained were then collected, processed and analyzed statistically and in the literature to produce data. The data is then presented descriptively in the form of tables and diagrams and is discussed narrativelyResults: Based on the research results of the 3 mosques, there are differences in the level of obedience in the form of percentages. The highest presentation level of compliance was achieved by the Research Location at the Al Furqon Arya Mukti Mosque, which was 73.9% in the good category, followed by the Research Location at the At Taqwa Ganesha Mukti Mosque, which was 70.3% in the good category, and the lowest presentation was occupied by the Research Location. At Taubah Liman Mukti is 56.3% in the sufficient category in terms of implementing the Covid 19 Protocol and the attitude and behavior of worshipers when praying Friday in the mosque.Conclusion: Overall, the compliance with the application of hand washing from the respondents of the congregation of the three mosques was included in the good category with a percentage above 65% (> 61%) and the application of wearing masks from the respondents of the congregation of the three mosques was included in the good category with a percentage above 70% (> 61%).