The main aim of this chapter is to explain and discuss the general features of left-wing terror organizations in Turkey. To achieve this aim, an introduction of the subject, including the historical background of terrorism in Turkey is given at first. Secondly, left-wing organizations are discussed. Herein, the main goals, strategies adopted, the recruitment process, education and training of the members and supporters, the organizational structures, financial sources, types of propaganda and activities of the organizations are explained. Finally, a conclusion includes the socio-economic background of the members who were arrested by the security forces. Secondary data and semi-structured interview techniques are used to collect the data needed.