Objective -to identify mechanisms of osteopenic syndrome implementation in patients with comorbid course of COPD and chronic pancreatitis (CP). 51 patients with comorbidity of CP and COPD (main group), 47 - with isolated COPD (compared group) have been examined. Assessment of excretory function of the pancreas was performed by determination of elastase-1 in the feces. Concentrations of interleukin-1β, interleukin-6 and tumor necrosis factor-α were determined by ELISA. It has been found out that patients with comorbid pathology are characterized by the significant decrease of bone mineral density than in the compared group. The progression of pancreatic dysfunction exacerbates the processes of bone resorption. It was estimated that increasing of proinflammatory cytokines concentration leads to considerable enhancement of osteopenic processes. The presence of concomitant chronic pancreatitis in patients with COPD brings in an aggravation of resorptive processes in bone tissue, the severity of which depends on the degree of excretory pancreatic insufficiency and expressivity of proinflammatory cytokine cascade.