Prosthetic valve implantation was performed for the systemic atrioventricular regurgitation in an old patient with corrected transposition of great arteries. SJM27M prosthesis was implanted without removing posterior and septal leaflet, chordae and papillary muscles with respect to preserve the function of the morphological right ventricle. It is important to preserve the function of the morphological right ventricle because it must continuously play a role of systemic ventricle even after surgical procedure.