This study examined the factor structure, reliability, and validity of the Antisocial Process Screening Device–Self-Report (APSD-SR), the Youth Psychopathic Traits Inventory (YPI), and the YPI–Short Version (YPI-SV) in detained female adolescents aged 12 to 17 years. The proposed three-factor structure of the YPI and YPI-SV was replicated, whereas the proposed three-factor structure of the APSD-SR or alternate models did not yield adequate fit. Overall, reliability indices for the YPI and YPI-SV were higher than those reported for the APSD-SR. APSD-SR and YPI scales were positively related with each other, except the affective dimensions of the instruments. All questionnaires showed good criterion validity but the YPI’s factor structure and reliability was superior to the APSD-SR. This superiority is not because of the larger number of items in the YPI, because we also demonstrated that the factor structure and reliability of the YPI-SV was better than that of the APSD-SR.