Many children with Autism Spectrum Disorder (ASD) demonstrate challenging behaviors. Since challenging behaviors are obstacles for social development and learning, it is important to determine if and what challenging behaviors are exhibited. Although there are some measures that asses for challenging behaviors, the majority were not specifically designed to assess for challenging behaviors among children with ASD, or do not solely assess for challenging behaviors. The Autism Spectrum Disorder-Problem Behavior for Children (ASD-PBC) is an 18 item informant based questionnaire designed to measure challenging behaviors in children and adolescents with ASD. Convergent and discriminant validity against the Behavioral Assessment System for Children, Second Edition (BASC-2), demonstrated the validity of the ASD-PBC for use among children and adolescents with ASD. (Contains 3 tables.)