Diabetic sclerodactyly is a frequently recognized skin finding that may occur in patients with diabetes mellitus but coexistence of diabetes and systemic sclerosis is rare. We describe a case of coexistence of type 1 diabetes mellitus and systemic sclerosis in 42-year-old man with the history of Raynaud's phenomenon, progressive diffuse hardening of the skin and sclerodactyly, slowly worsening with time. The medical history included type 1 diabetes since childhood with microvascular complications. The patient presented a typical capillaroscopic scleroderma-like pattern, antinuclear antibodies and sclerotic lesions in gastrointestinal system. Summing up, our case represents the rare coexistence of autoimmune diseases like diabetes mellitus type 1 and systemic sclerosis.