This book provides an insight into different fixed functional appliances used for the correction of class II malocclusion. Correcting this malocclusion has constantly challenged an orthodontist owing to the complex and multifactorial etiology. The age of the patient and selection of the appliance plays an important role in the treatment outcome. Growth modification using functional appliances achieves stable results in class II patients. An orthodontist has a wide variety of fixed appliances for addressing a class II malocclusion. The choice of appliance should be based on the proper diagnosis of the different aspects of the malocclusion. The clinician should become familiar with the function and uses of each appliance and determine the best appliance to use in each clinical application.