In theory we meet a lot of more or less uniform definitions about organized crime which have common characteristics, typical for this type of criminal offences. We can find organized crime all over the world and it's not surprising that it's very difficult to combat with. Its spread is increasing from day to day. Theorists agree that s single regulation at the international level in fight against this form of crime is needed urgently. In Slovenia, high number of cases connected with organized crime can be noted by the police anuually, although the number has stayed approximately the same in last few years. Drug trafficking is a big part of organized crime. We can find several cases of criminal offences related to organized crime groups that dal with smuggling prohibited drugs. Statistic show that the number of criminal offences related to organized crime is the biggest in the field of drug trafficking. When the police discover the drug, they are obliged to seize it. Because of its nature the druge once taken away can't be returned. According to the statisti cof the police, the quantity of seized drugs is high.