The mentalis (also mentalis muscle, latin: musculus mentalis) is a facial muscle located in the chin area.
The mentalis originates from the alveolar process of the mandible in the region of lateral incisor. The muscle radiates and inserts into the skin of the chin.
Upon activation the mentalis muscle produces small dimples in the chin. Contractions of the muscle can produce facial expression of doubt and indecision.
The mentalis is innervated by the marginal mandibular branch of the facial nerve (CN VII).