Children with cerebral palsy (CP) have postural control problems due to the lack of motor and sensory development. Trunk control which has an important role in ensuring postural control, is the basis for sitting, mobility, development of the upper extremity, pulmonary function and activities of daily living. Poor postural control restricts upper extremity functions which also affects the quality of movements. For this reason, it is important to assess the relationship between trunk control and upper extremity functions. This study is planned to investigate the effect of balance and trunk control on upper extremity functions in children with CP.