The aime of this study was to determinethe effect of gender on the soft tissue of the chin at each type of rotation patterns of the lower jaw (Anterior - normal - Posterior) The sample consisted of 100 X-ray Lateral cephalometric radiographs of (69 female _ 31 male) adults, has been selected according to the following conditions: Age between 18-26 years old, , exclusion of all cases of Intenseocclusal abnormalities , Permanentocclusionand there is noformaldentalabnormalitieswithout takinginto accountthe thirdmolars, The absence ofa previousorthodontic treatment, the patient free fromsystemic diseasesorcongenital malformationsanddevelopmentaldisordersandsyndromesand there is no story of a previous surgery in the head and neck area The sample was divided into groups according tosex andmandibularrotation(Anterior - normal - Posterior). Then we studied variablesrepresentative the lower jaw rotation andanother ones representativethemeasurementsof the chinsoft tissue. The results showed a difference theaveragesof the soft tissue thickness and the indicators of mandible rotation between the sexes In favor of males, And theaveragesof thevariables showed Correlationbetween chinsofttissuethicknessin femaleswiththree typesoflower jawrotation Compared with males.