In some Belgian cases of smuggling and trafficking of human beings, police found indications of connections with terrorism. Following examples illustrate transportation of terrorists within smuggling of human being criminal networks and financial support of organized crime to terrorist activities. Investigations should always be started when there are indicators of terrorism in a case of smuggling or trafficking of human being by criminal organization. Often such connections escape the attention of magistrates, mainly when investigations are managed by specialised prosecutors or covered by different districts.