Anterior open bite is considered a malocclusion that still defies correction, especially in terms of stability, midline Diastema create an unpleasant appearance for individuals, sometimes it may lead to phonetic problems, particularly in cases with wide space. This article describes a clinical rare case of a severe anterior open bite and an unusual midline Diastema which resulted from an atypical swallowing and shows the importance to set up an early my functional rehabilitation procedure to correct the oral habit and to prevent such malocclusion with consequences on aesthetics and self-confidence.