平滑肌瘤是一种良性肿瘤,最常见于子宫肌层、胃肠道和皮肤。口腔缺乏平滑肌组织,所以发生于口腔的平滑肌瘤比较罕见。口腔平滑肌瘤可以发生于任何年龄,常表现为一缓慢生长的实性黏膜下结节。尽管有时会伴有疼痛,但大多数患者无任何症状,最常见的部位是唇、腭和舌。口腔平滑肌瘤的诊断主要依靠组织病理学检查,本文报道1例发生于舌的平滑肌瘤。 Leiomyoma is a benign tumor, most commonly found in the myometrium, the gastrointestinal tract and the skin. Oral lack of smooth muscle tissue, so occurs in the oral leiomyoma is relatively rare. Oral leiomyomas can occur at any age and often manifest as a slow, solid submucosal nodule. Although sometimes accompanied by pain, but most patients without any symptoms, the most common site is the lips, palate and tongue. The diagnosis of oral leiomyoma mainly rely on histopathological examination, this article reports 1 case of leiomyoma occurred in the tongue.