The case is reported of a 79-year-old female who received a patch augmentation of the tricuspid anterior and septal leaflets with a resected left atrial wall to address recurrent tricuspid regurgitation, including tricuspid valve tethering. The patient was admitted to the authors' hospital for chronic heart failure with paravalvular leakage after aortic valve replacement and recurrent severe tricuspid regurgitation. She had undergone two previous cardiac surgeries. Re-tricuspid repair required an augmentation of the tricuspid valve leaflets in addition to tricuspid annuloplasty. As the autologous pericardium was unsuitable for a patch due to thickened and stiffened changes, the decision was taken to use a left atrial wall resected to reduce the size of giant left atrium, which was thin and easy to handle. This is the first report of tricuspid leaflet augmentation using a patch derived from the left atrial wall, which is a useful method in patients where pericardium is not available.