Objectives: This study aimed to determine the accuracy of minor salivary gland biopsy in diagnosing Sjögren syndrome. The specific purposes of the research were to determine whether FS correlates with anti-SSA (Ro), anti-SSB (La), anti-SSA+SSB, Qs and Qss, and to determine and compare the usefulness of Qs and Qss in both groups of respondents. Materials and methods: The research was conducted on 37 subjects. The respondents were divided into two groups. The test group consisted of 15 patients diagnosed with SS, while the control group of 22 patients included those patients who did not meet the ACR/EULAR diagnostic criteria. Results: The calculated sensitivity, specificity and accuracy of minor salivary gland biopsy were 86.7%, 100% and 94.6%. Furthermore, the results obtained by the Fisher exact test show a statistically significant association between FS and ANA (P = 0.002). Also, Pearson's correlation showed a weak, negative, statistically insignificant correlation between Qs (r = -0.058, P = 0.731 and Qss (r = -0.022, P = 0.899) to FS. Obtained results indicate greater usefulness of Qss compared to Qs in diagnosing SS. Conclusion: Although minor salivary gland biopsy has a significant diagnostic value in the diagnosis of SS and shows excellent accuracy, it is not always accurate. Standardization of histopathological interpretation is needed for more accurate results.