Liver cirrhosis is among the first 10 causes of death in Cuba. It is also a health problem at the world level. The complications presented as a consequence of this disease increase its reserved prognosis. With the objective of determining the Diabetes Mellitus frequency as one of those complications, a descriptive retrospective study was carried out in 27 cirrhotic patients followed in the Gastroenterology outpatient consultation of the Teaching Territorial Hospital Dr. Mario Munoz Monroy, municipality of Colon, Matanzas, in the period from January 2003 to January 2013. 77,8 % of the patients were men; 51,9 % presented alcoholic-caused cirrhosis and 25,9 % of them viral-caused cirrhosis; in 22,2 % of the cirrhotic patients, diabetes was diagnosed in the evolution of their disease. We arrived to the conclusion that Diabetes Mellitus shows a high frequency as a complication influencing the natural history of patients with liver cirrhosis. We recommended systematically screening this disease in the cirrhotic patients’ routine follow-up.