Hazelnutis a highly sought culture in the world because of its economic significance, it is used in the pharmaceutical, food and confectionery industry, while the hazel is used in the wood processing industry for the manufacture of furniture and various house hold work items. Hazelnuts contain most oils (52-78%), proteins (2.4-6%), mineral substances (about 3%, most calcium, magnesium, phosphorus and potassium) and vitamins (A, B5 and P). The hazel is a weakly demanding plant, unlike other fruit trees. It can grow on any type of soil, it only has great water needs. Since it is a heliophilic plant, climatic conditions in the continental part of the Republic of Croatia do not entirely correspond to it. In this part are the climate with cold winters and warm summers, and the hazel is the first flower of all fruit trees and its vegetation begins at the end of the 2nd month when there are great opportunities for the frost that destroys the open buds and flowers and leaves the hazel at the end of the year without crop. Because of its economic significance and lack of the global market, the hazelnut reaches a high purchase price, and its low investment costs make it profitable. In the Republic of Croatia, in the 1980s, PP Orahovica raised the firs thazel orchard. Subsequently, a significant expansion of the hazel orchard began in 2000. when the state introduced incentives for planting hazel orchard. Since 2008, until now in the Republic of Croatia only the increase of the hazel orchard has been recorded. Despite new plantations, Croatia does not produce enough quantities for its own needs and is forced to import hazelnuts while domestic producers are exporting their hazelnuts because they can not meet the requirements of the domestic confectionery industry. The main consumers in the Republic of Croatia are the confectionery and food industry, as well as the retail chains that have certain criteria when they buy hazelnut, which domestic producers can not fulfill. In order to meet these requirements it is necessary to develop hazelnut processing plants which will open up a new door of the world market for homemade manufacturers.