Introduction: Treatment of patients with chronic pancreatitis (CP) remains the most difficult task of pancreatology. Paraduodenal inflammation gave the possibility to diagnose paraduodenal – “groove” - pancreatitis. The aim of the work – to investigate the features of diagnosis and surgical treatment of patients with complicated form of "groove" pancreatitis. Material and methods: The experience of surgical treatment of 71 patients with CP for the last 7 years has been analyzed. 27 patients with inflammatory and necrotic lesions of the pancreatic periampular part – “groove” pancreatitis were retrospectively selected out of them. 24 out of 27 patients with "groove" pancreatitis were underwent to surgical treatment. Pancreatoduodenal resections were performed in 12 patients. Organo-saving operations were performed in 10 cases. Results: The course of the postoperative period was satisfactory in 17 people out of 24 (70.8%). 7 patients developed postoperative complications. 1 patient died. As a result of 24 operations, the mortality rate was 4.17%. Conclusions: Thus, the chronic lesion of the parenchyma of the pancreas of the inflammatory genesis - "groove" pancreatitis - is one of the rare forms of CP which should be differentiated from cancer of the gland. In fact HP and certain types of inflammatory-necrotic lesions of the duodenum. The correct surgical tactics in case of patients’ treatment with a rare form of CP complication - "groove" of pancreatitis - allows to eliminate pain syndrome and contribute to their recovery.