یسیBackground and Aim: Pancreatic pseudocysts are localized fluid complexes abundant in amylase and other pancreatic enzymes and surrounded by a fibrous tissue wall. The incidence of these cysts is less than 1 in 60,000 deliveries, and the management of this rare condition is not standardized and is treated conservatively. This study reported the case of pancreatic pseudocyst, which was diagnosed three days after the first delivery. Case presentation: The patient was a 36-year-old woman with G1P1L2 admitted to the health center three days after cesarean delivery due to epigastric pain and abdominal pain. The patient only mentioned a history of hypothyroidism in a recent pregnancy. A CT scan revealed that fluid had accumulated in the Morrison space and the subhepatic space of the patient. A Pantoprazole injection of 40 mg was prescribed to control epigastric pain. After stabilizing the symptoms, due to the patient's reluctance to undergo an endoscopic ultrasound, he was discharged with the advice of following a controlled diet and regular follow-ups. Conclusion: Pancreatic pseudocyst associated with pregnancy is a serious condition that requires regular assessment during the perinatal period due to the possibility of cysts increasing in size. Symptoms are usually nonspecific and may present with only vague abdominal pain, nausea, or vomiting. Diagnostic and treatment options during pregnancy are limited, and each has its advantages and disadvantages. If performed carefully and cautiously, abdominal ultrasound is a suitable method for initial diagnosis and selection of patients to receive care and further evaluations.