Hani Mohammed Alsrooh*, MarwaSamehShamaa**, Maher Abd El-Salam Fouda*** *Master student, Department of Orthodontics, Faculty of Dentistry, Mansoura University, Egypt    **Lecturer of orthodontics, Department of Orthodontics, Faculty of Dentistry, Mansoura University, Egypt    ***Professor of orthodontics, Department of Orthodontics, Faculty of Dentistry, Mansoura University, Egypt    Abstract: Objective: The aim of this study was to assess the skeletal and dental changes of skeletal open bite malocclusion corrected by rapid molar intruder on bite blocks. Materials and Method:This study was conducted on a sample of 13  patients (9 female and 4male) which they presented with skeletal open bite malocclusion. Age ranges from 8-12 year. cephalograms were taken and analyzed before and after the treatment to evaluate the efficacy of the appliance. Results: Open bite treatment was accomplished by counterclockwise rotation of the mandibular as a consequence of redirecting growth. Molar intrusion was statistically significant for both mandibular and maxillary first molars .Significant reductions were noted for vertical skeletal characteristics in this study. Conclusions: The rapid molar intruder appliance provided efficient bite closing and appropriate skeletal and dental   changes for nonsurgical open bite correction in growing patients.