Objective To measure the utility value of different skeletal malocclusion for patients receiving or - thodontic treatment. Methods Utility value of different skeletal malocclusion for patients was measured by rating scale and time trade-off. Results The youth group had higher utility values than adult group for skeletal malocclusion Class Ⅱ（protruding facial type） with median mandibular angle. The utility value of skeletal malocclusion Class Ⅲ（concave facial type） with low mandibular angle was the lowest, and the utility value of skeletal malocclusion Class Ⅱ（protruding facial type） with median mandibular angle was the highest. There was no difference in the utility values by rating scale and by time trade-off. Conclusion For some skeletal malocclusion, the youth had different utility values with the adult.
