The congregational prays are one form of the activity of prospering mosque. Prospering mosques is an obligation for muslims by functioning mosque through religious and social activities. When the corona virus has spread to the world, the Indonesian government urges the public to avoid crowds and maintain physical distance as an effort to prevent the transmission and spread of Covid-19. This condition affects the activities of Muslims to conduct congregational prayss at the mosque. The purpose of this study was to determine the implementation of congregational prays in order to prosper mosques during the Covid-19 pandemic. This type of research was field research with a qualitative descriptive approach. In this study, data collection techniques were carried out by observation, interviews, and documentation. Techniques for checking the validity of the data were carried out by extending participation, observing persistence and triangulation. The result showed that the implementation of congregational prayss was carried out very well by complying with health protocols including: ablution at home, wearing masks, carrying prays equipment, measuring body temperature, entering disinfectant spray booths, washing hands with soap, keeping prays lines apart, no physical contact. (handshake), and don't touch the eyes, mouth and nose. The conclusion is that the more a person adheres to health protocols, safer the congregational prays will be.