The paper presents six Late Antique latrinae excavated in Serdica during the last few years. Every latrina is presented with its location, description, chronology and function. This is the first attempt for a study on the Late Antique sanitation in one of the major cities in present-day Bulgaria. Typological features of the latrinae and their chronological development are discussed. On the base of the entire formal, chronological and functional analysis is presented a possible picture of some social and moral changes in the Late Antique society, which reflected by contemporary sanitation facilities.