OBJECTIVE: To study postural changes, taking into account different mandibular positions and the cephalic and plantar body segments. METHODS: A cross-sectional, descriptive, clinical, and observational study was carried out on 76 patients, (mean age 28.79 years), in whom body posture and plantar support were evaluated in the maximum mandibular intercuspal position and the mandibular rest position without dental contact. RESULTS: When the mandibular position was altered, 71.01% of the patients showed changes in the bipupillary line ( CONCLUSION: There is a positive relationship between the different segments in body posture. In the sample, changes in plantar support with respect to the different mandibular positions were noticeable.