The objective of this descriptive study was to determine the skeletal components of class III malocclusion in patients treated at the Functional Orthopedics and Orthodontics Clinic of the Universidad Cooperativa de Colombia, Bogotá headquarters. The sample was 111 lateral radiographs that met the following inclusion criteria: patients with a skeletal class III diagnosis, over 13 years of age and a completed clinical history. Profile radiographs with lack of sharpness, image distortion, poor position of the patient at the time of taking, stained and mutilated were excluded. The cephalometric study was computerized using special software. Four angular and four linear measurements were recorded taken from different cephalometrics (Steiner, McNamara, Jacobson), which confirm the diagnosis of skeletal class III. Among the main results were: 42.3% of patients presented, as the main component of class III, maxillary retrusion, and 48.7% had mandibular protrusion. The main measure to determine the skeletal component is ANB, which in this study returned a significant number of negative values, confirming skeletal class III.