Intra-abdominal abscesses usually originate from the gastrointestinal tract, with 70% occurring in the postoperative period. The mortality rate can reach 50%. These abscesses most commonly develop in the subphrenic and subhepatic spaces. Treatments include percutaneous drainage or surgical drainage. In this report, we present a minimally invasive video-assisted trans-diaphragmatic drainage (MIVTD) method through a simple incision using a right intercostal approach. This method was successfully performed on a patient who underwent Graham patch repair with laparotomy due to a diagnosis of peptic ulcer perforation and subsequently developed a right subphrenic multiloculated collection after unsuccessful percutaneous drainage.