The present invention relates to a tissue protection device for tricuspid regurgitation surgery and, more particularly, to a tissue protection device for surgery on patients suffering from tricuspid regurgitation. The tissue protection device for tricuspid regurgitation surgery according to a preferred embodiment of the present invention includes: a hollow coronary sinus tube (22) for protecting coronary sinus tissue； and a hollow tricuspid valve tube (24) for protecting tricuspid valve tissue and interventricular septum tissue, wherein the coronary sinus tube and the tricuspid valve tube are laterally coupled with each other from upper portions thereof by a predetermined length, and lower portions thereof are separated from each other； and the lower portion of the tricuspid valve tube (24) is provided with a blocking part (30) for blocking a space resulting from incomplete closure of the tricuspid valve.
