Background: Today, repair techniques almost completely take place of the mitral valve replacement, especially in patients with degenerative disease. Majority of the surgeons hesitate to prefer repair in patients with bileaflet prolapse. In this study we aimed to investigate postoperative results of our patients with mitral valve insufficiency due to bileaflet prolapse and treated with repair techniques. Methods: 89 patients who underwent mitral valve repair by the same surgical team due to bileaflet prolapse, between January 2006 and January 2016 in Hospital were included to this study. Preoperative, operative and postoperative data such as mortality, recurrent mitral insufficiency, echocardiographic chages and reoperation rates were investigated. Results: Mean follow up duration was 25.3±17.7 months. Mean age was 46.6±17.4. According to transthoracic echocardiographic evaluations, 8 (%9) patients had moderate and 81 (%91) patients had severe mitral insufficiency. When preoperative and postoperative values were compared, there was statistically significant improvement in functional capacity of patients according to NYHA classification. (2.1±0.5;1, p=0.001) Improvements in left ventricular end diastolic diameter(5.5±0.7; 5±0.6, p=0.001), left ventricular end sistolic diamete(3.8±0.6; 3.6±0.6, p=0.004 )r, left atrium diameter(4.8±0.9; 4.3±0.6, p=0.001) and pulmonary artery pressure (44.3±13.4; 32.1±5.4, p=0.001) were statistically significant. Conclusions: In the lights of findings about good postoperative results and durability rates, mitral valve repair can be safely used in patients with mitral valve insufficiency due to bileaflet prolapse especially with chordae replacement technique which can be feasible after improvements in suture technologies.