Sialolithiasis is characterized by formation of concrements within the ducts of the salivary glands, being one of the most frequent pathology of those glands. The aim of the study was to determine the morphological changes of the salivary glands tissue in sialolithiasis. The study group included 148 patients with sialolithiasis, examined and treated in the Oro-maxillo-facial Surgery Department of the MSPI Institute of Emergency Medicine of Chisinau Municipality. The male patients were represented by 58.1% and the female ones by 41.9% (p<0.01). The age of the patients varied between 16-84 year, with a mean of 47.7 ± 1.3 (95% CI: 45.2 – 50.2) years, (p=0.107). As a result of the research a series of morphological changes were established, involving both the parenchymatous and interstitial components. The identified morphological lesions were distributed in 8 categories of predictive factors: circulatory disorders; alterative-dystrophic processes; inflammatory process, manifested by lymphocytosis; plasmacytosis; granulocytosis; fibroblastic reaction; sclerosis with fibrosis, and steatosis. As a result of the histopathological study, deep morphological changes, caused by inflammation and sclerosis associated with fibrosis, considerably involving the structural and functional components of the glandular parenchyma were established.