Arterial hypertension is often present in type 2 diabetic patients as part of metabolic syndrome of insulin resistance with dyslipoproteinemia and central obesity. Hypertensive diabetic patients have 2-times higher cardiovascular disease risk as compared to hypertensive non-diabetic patients. New definition and classification of blood pressure levels prepared by WHO-ISH, or JNC 7 should be implemented to the practice of internists and general practitioners. Long-term efficient antihypertensive therapy to achieve target blood pressure is a cornerstone for reduction of cardiovascular and cerebrovascular morbidity, and all-cause mortality in diabetic patients. All patients with diabetes and hypertension should have treatment that includes either angiotensin converting enzyme inhibitor, or angiotensin receptor blocker, which are also the recommended treatment in diabetic nephropathy.