Abstract: Gastric mucosa-associated lymphoid tissue (MALT) lymphoma is an indolent tumor that most commonly occurs in the gastric mucosa. The authors presents a patient with gastric MALT lymphoma who underwent imaging with ¹⁸F-fluorodeoxyglucose (FDG) PET/CT and ⁶⁸Ga-Pentixafor PET/CT. By analyzing and comparing clinical symptoms, conventional imaging findings, and ¹⁸F-FDG PET/CT and ⁶⁸Ga-Pentixafor PET/CT images, it deepens the understanding of gastric MALT lymphoma imaging with ⁶⁸Ga-Pentixafor PET/CT in clinical physicians.