The middle of last century it was established that the increased value registered fibrinogen in patients with coronary disease, hypertension, peripheral artery disease, patients with diabetes mellitus. Fibrinogen also participate in the earliest stages of atherosclerosis.Task of our research was to compare the level of fibrinogen in patients of type 2 diabetes mellitus without complications, and manifested in patients with apparent chronic complications as well as the correlation of fibrinogen with the parameters of metabolic control. Included 64 respondents, a close age divided into 4 groups: control group, people of type 2 diabetes mellitus without complications, people with microvascular complications, and people with macrovascular complications.The highest average value of fibrinogen in the blood we had in the group with diabetes mellitus without complications (3.47±0.26 g/l) and the lowest mean value in the control group (2.87±0.15 g/l). It is a test of correlation showed a strong correlation with the value of fibrinogen level of development of chronic complications.