We presented a rare case of papillary fibroelastoma attached to the mitral chordae of posterior leaflet which caused a serial of symptoms including palpitation and frequent ventricular ectopics.Preoperative echo showed that the tumor was located under the mitral leaflet and attached to the chord of posterior leaflet.It was concomitant with mitral regurgitation and patent foramen ovale.Conventionally,most of the cardiac surgery accessed through median stemotomy.There were relatively large incisions and the risk of deep stemal infection existed.Another operative option was also reported.Under the magnified operative field,the tumor which was attated in the mitral chord was gently removed using robotic assisted surgery approaching though 5 cm right thoractomy.The mitral valve repatiment and closure of patent foramen ovale were performed contemporarily.Postoperative eacho showed no mitral regurgitation.With relative short hospital stay,the patient recovered from surgery uneventfully.