The aim of the present study is to determine patterns and personality disorder in subjects under cocaine dependence treatment using MCMI-II, and their relationship with sociodemographic variables and consumption characteristics. We assess 102 subjects under cocaine dependence treatment in Drug Abuse Centers in Galicia (Spain). The results indicate that the most prevalent basic scales of personality are the passive-aggressive, antisocial, narcisism and histrionic. Borderline and paranoid scales are the most prevalent with regard to the pathological personality scales. These results coincide with other international and national studies. We conclude pointing out the necessity to carry out studies with wider cocaine dependence samples in treatment, and the specific inclusion criteria should be established in the study. We also indicate the importance of carrying out a previous assessment of all demanding treatment subjects to design the objectives of the mentioned treatment.