The aim of this study was to determine the effectiveness of the Triple P-Positive Parenting Program (Triple-P) training for mothers on the emotional and behavioral problems of children aged 6 to 12 years. In a quasi-experimental design with a pretest-posttest and control group, 30 mothers of children aged 6 to 12 years with behavioral problems, who had sought counseling at a center in Pakdasht (a city in Iran), were selected using purposive sampling and randomly assigned to experimental and control groups. Data were collected using the Strengths and Difficulties Questionnaire (SDQ). The experimental group received training in the Triple-P program for eight sessions of 120 minutes each, while the control group received no intervention. Multivariate analysis of covariance (MANCOVA) indicated that Triple-P training for mothers significantly improved children's emotional symptoms, conduct problems, hyperactivity, peer relationship issues, and prosocial behaviors (P<0.001). Accordingly, the Triple P-Positive Parenting Program (Triple-P) training appears to be an effective intervention for reducing emotional and behavioral problems in children aged 6 to 12 years.