Abstract: Intraoral device (1) for improving balance, posture and morphofunctional alignment of the craniomandibular complex, includes a sheath (2) adapted to cover at least one portion of the upper dental arch of the subject using the device (1), characterized in that it comprises the palate stimulation component (3) adapted to induce a constant stimulation of the receptors present in the front portion of the palate simulating lingual activity, said component (3) being firmly integrated with said sheath (2) and being extended, from the back of the upper incisors, along the front portion of the palate when said device (1) is worn, and in that it comprises at least one plate (4) with variable thickness, suitable for mandibular realignment, and to be assembled to said sheath (2), said plate (4) being reversibly assemblable to the palate stimulation component (3) integral with said sheath (2).