With the rising of augmentation mammaplasty, deflation of implant is increasing. So authors investigated and analyzed on patients who were treated due to deflation. Subjects were 15 patients(16 breasts) from September 1995 to March 2006. Authors had been investigated and analyzed the method of augmentation mammaplasty, types of breast implant, duration until deflation occurred, duration to reoperation, reoperation method and patient satisfaction. The follow-up period after reoperation was 33 months. The methods of augmentation mammaplasty were 13 patients(13 breasts) for transaxillary approach, 1 patient(1 breast) for inframammary approach and 1 patient(2 breasts) for periareolar approach. Location of implants was subpectoral plane. 2 patients(2 breasts) had silicone bag and 13 patients(14 breasts) had saline bag. The average time elapsed to deflation was 36 months. The elapsed time to reoperation were within 1 month(12 breasts), 4 months(1 breast), 6 months(1 breast), 7 months(1 breast) and 10 months(1 breast). The removal of mammary bag was performed only for 3 patients(3 breasts) and reaugmentation was performed for the rest of them, 12 patients(13 breasts). In reaugmentation, most of patients received the previous approach again. In case of reoperation, partial capsulectomy was performed. There were no patients of deflation. The patients had found good satisfaction in our management.