Objective: This study was done to evaluate dento-alveolar heights in Egyptian children with class III malocclusion. Material and Methods: A sample of 85 pretreatment cephalometric films for Egyptian children (39 boys and 46 girls) were collected over several years. The age range for the study was 7-12 years. The sample was divided into two groups according to skeletal and dental relations. Group 1: Class I (Control group: n=40, mean age: 9.18±1.48). Group 2: Class III (Study group: n=45, mean age: 9.36±1.39). Results: For dento-alveolar heights: U1-PP (mm), L1-MP (mm) & U6-PP (mm) Showed significant lower values in class III group. PP-GoMe (angle) was statistically significant with lower value in class III group compared with the control group. Conclusion: U1-PP, L1-MP and U6-PP, all these dento-alveolar heights were shorter in class III comparing to those of class I. The accurate treatment planning for growing class III patients is the key for a successful orthodontic outcome.