It was studied the state of the vascular wall at metabolic syndrome (MS) in children and adolescents. The study included two groups of children: 45 people with MS and 25 patients with simple obesity. With the help of the device Vasotens assessed indicators of vascular stiffness: pulse wave velocity in the aorta, the indices of stiffness and augmentation of the peripheral arteries and the aorta, the maximum rate of rise in blood pressure. The study showed that 70% of children with MS increased arterial stiffness and thickness of the vascular wall. The rigidity of the vascular wall in children with MS revealed a 3.5 times more likely than children with simple obesity. Pulse wave velocity is a predictor of hypertension and has a high correlation with SDS IMT.