We experienced a case of congenital tricuspid stenosis. The patient was 5 years old boy. The 2D-echo 4 cardiac catheterization with cineangiogram revealed as Tricuspid Stenosis, associated with functioning patent foramen ovale & mild R.V hypoplasia. The lesion was successfully corrected by TV commissurotomy & closure of PFO. Postoperatively, moderate degree of tricuspid regurgitation was remained.