Ovarian cysts are fluid-filled sacs that are discovered incidentally, on physical examination, imaging or symptomatic. Recently there has been increase in ovarian cysts in unmarried, nulligravida young women, so ovarian preserving minimal invasive surgeries have come into role with compared to open surgeries done in the past which resulted in more adhesions, subfertility and poor reproductive outcome. This is a case report of 26 years, unmarried female who had large right ovarian cyst (20 × 16 × 14) cm with complaint of mass in abdomen since 4 years , underwent laparoscopic assisted ovarian cystectomy by mini laparotomy with no intraoperative or postoperative complications. So the ovarian cystectomy by laparoscopic guided mini laparotomy is a better alternative in minimally invasive surgery for huge benign ovarian cysts.