The most important problem in the postoperative period in patients scheduled for pectus deformity correction surgery is pain. Due to the catastrophic neurological complications of thoracic epidural analgesia, the tendency towards plane blocks has been increasing in recent years. Serratus Plane Block (SAP Block), performed under ultrasound guidance, is used to treat pain in thoracic surgery. However, whether it has an effect on sternum pain is still controversial and there are not enough studies. Transversus thoracic plane block (TTP Block) provides effective analgesia in sternotomies. For this reason, we aimed to show that the TTP block added to the SAP block will provide more effective analgesia in order to provide adequate analgesia for the pressure and pain sensation of the bars placed on the sternum in pectus surgery.