Diabetes is a common endocrine disorder. According to the data from the World Health Organization and the International Diabetes Federation, almost 250 million people are suffering from diabetes around the world, approximately 5 % of which need insulin immediately. They have diabetes mellitus type 1. Most patients with type 1 diabetes are young. The number of children with newly diagnosed diabetes has been increasing rapidly during the past 50 years. Strict metabolic control is extremely important for delaying diabetes complications for several decades; such complications are retinopathy, nephropathy, peripheral and autonomic neuropathy. Insulin pumps, modern insulin analogues and continuous glucose monitoring systems can help us achieve these goals in a large group of patients.