The article deals with the activity stages and forms of Society of Lithuanian Pathologists (in 1954-1991--Republic Scientific Society of Pathologoanatomists, in 1991-1996--Society of Lithuanian Pathologoanatomists). Founder of the Society and the first President (in 1954-1976) was prof. Janina Mackevicaite-Lasiene, in 1976-1996--prof. Elena Stalioraityte and since 1996 up till now--prof. Dalia Pangonyte. Taking into account the needs of medical research and practice, its activities varied. According to the tasks there are 4 stages of Society activity. The first--establishment of pathological practice, introduction into clinic and pathological practice of pathogenetic and nosologic diagnosis; the second--consolidation and development of pathological practice, conveyance of pathology knowledge, optimization of pathology teaching and training of specialists; the third--reforming of Society and pathological practice, widening of international relations; the fourth--introduction of recent methods and information technologies in pathological practice and teaching. The Society has organized ten republic conference and two congresses, four school-seminars, its members published 19 monographs and collections of articles, 6 textbooks, 28 learning books, 26 methodical recommendations, more than fifty members acquired academic degree.