Double clefts of both the anterior and posterior leaflets are extremely rare. A 21-year-old female with mitral valve regurgitation was admitted to our institute, and real-time three-dimensional transesophageal echocardiography revealed a cleft in the posterior mitral valve leaflet and an additional partial cleft in the anterior leaflet. Totally-endoscopic mitral valve plasty using surgical robot with direct suturing of both clefts, and annuloplasty were performed successfully. This is the first report of robotic totally-endoscopic mitral valve plasty for mitral regurgitation due to double clefts of the anterior and posterior mitral valve.