Myotherapy intervention in facial aesthetics aims to attenuate wrinkles and signs of facial aging. The relationship between accentuated muscle contraction during chewing, swallowing and speaking and the appearance of facial wrinkles has been suggested by speech-language pathology literature. This study aimed to report the effect of electromyographic biofeedback associated with training of chewing, swallowing, and smiling patterns, during speech therapy intervention aimed at reducing the signs of facial wrinkles and furrows, in a 55-year-old woman. The therapy also included isotonic and isometric exercises and clinical procedures to decrease the contraction of facial mimicry muscles, which were not associated with training using electromyographic biofeedback. Signal collection and training were performed using the Biotrainer software on the New Miotool Face by Miotec, over nine weekly sessions. Two assessments were performed (before and after the nine sessions), using the MBGR Protocol (assessment of chewing, swallowing, and smiling) and validated scales described in the literature (assessment of signs of facial aging). In the reported case, the usefulness of electromyographic biofeedback was verified for learning trained orofacial myofunctional patterns, as well as to improve chewing and swallowing functions and decrease signs of facial aging. However, further research is needed to demonstrate the positive effects of electromyographic biofeedback associated with myofunctional therapy aimed at attenuating the signs of facial aging.