The serratus anterior plane block (SAPB) is an ultrasound-guided fascial plane block used for perioperative analgesia in thoracic and breast surgeries. This technique involves the injection of local anesthetic into either the superficial or deep interfascial plane around the serratus anterior muscle at the mid-axillary line, targeting the lateral cutaneous branches of the intercostal nerves and providing analgesia to the anterolateral thoracic wall. The present prospective, comparative, single-blind clinical study aims to compare the postoperative analgesic efficacy of superficial and deep SAPB techniques in patients undergoing mammoplasty surgery. The primary objective is to evaluate total opioid consumption within the first 24 hours postoperatively,while secondary outcomes include postoperative pain scores,additional analgesic requirements, postoperative nausea and vomiting, patient satisfaction, time to first mobilization, and vital signs within the first 24 hours postoperatively. The results of this study may help determine the more effective SAPB technique for improving postoperative pain control and reducing opioid use in patients undergoing mammoplasty.