Primary cardiac lymphoma is rare, with a frequency of 1.0% to 1.6% among cardiac malignant tumors. Chemotherapy is often selected as first-line treatment for primary cardiac lymphoma. However, when the tumor causes heart failure or life-threatening hemodynamic collapse, antecedent urgent surgery is required. We herein report a successful case of complete tumor resection and reconstruction of the right atrium and right ventricle using a bovine pericardial patch combined with tricuspid valve replacement in a patient with a huge primary cardiac lymphoma filling the right heart that manifested as tricuspid valve stenosis and subsequent heart failure.