Ureteropelvic junction obstruction (UPJO) is a significant cause of hydronephrosis, often requiring surgical intervention. Laparoscopic dismembered pyeloplasty (LDP) has emerged as a minimally invasive alternative to open pyeloplasty, offering potential benefits in terms of reduced pain, shorter hospital stay, and improved cosmesis. This abstract focuses on the transperitoneal approach to LDP for UPJO. The transperitoneal approach, while providing excellent visualization of the renal pelvis and ureter, requires careful dissection and meticulous handling to avoid injury to surrounding structures such as the colon, duodenum, and major blood vessels. The procedure typically involves a three- or four-port technique, utilizing a laparoscope and specialized laparoscopic instruments. After mobilization of the kidney, the surgeon meticulously dissects the UPJ, identifying and preserving the vascular supply. Complete dismemberment of the UPJ is crucial for optimal reconstruction. Various techniques exist for pyeloplasty reconstruction, including the spatulation, end-to-end anastomosis, and the extracorporeal techniques. The choice of technique depends on the surgeon’s experience and the specific anatomical features of the UPJ obstruction. The anastomosis is typically performed using absorbable sutures, ensuring a tension-free and watertight repair. Intraoperative fluoroscopy can be utilized to confirm the patency of the reconstructed UPJ. Compared to open pyeloplasty, LDP offers several advantages. Patients generally experience less postoperative pain, shorter hospital stays, and faster return to normal activities. The smaller incisions result in improved cosmesis and reduced risk of wound infection. However, LDP also presents unique challenges, requiring specialized surgical skills and equipment. The steep learning curve and potential for increased operative time compared to experienced open surgeons are limitations. Careful patient selection is crucial, considering factors such as body habitus, previous abdominal surgeries, and the complexity of the UPJO. Long-term outcomes of LDP are comparable to open pyeloplasty, demonstrating similar success rates in terms of relieving hydronephrosis and improving renal function. Further research is needed to optimize surgical techniques and identify predictors of long-term success. Overall, LDP, using the transperitoneal approach, represents a valuable minimally invasive option for the management of UPJO, offering significant advantages for appropriately selected patients.