One hundred six consecutive patients aged 75 years and over (mean age 77.1, 75-84) underwent coronary artery bypass. Controlled group is 287 patients undergoing CABG in 1996. The number of bypass graft, arterial graft, Ao-cross clamp time, CPB time, operation time in aged group and controlled group were as follows 3.3 and 3.3, 1.9 and 2.5 (p < 0.01), 106 and 104, 333 and 328. The number of anastomose per patients with LITA, SVG, GEA, RITA, IEA, RA, as follows 1.0 and 1.0, 1.5 and 0.5, 0.6 and 0.5, 0.1 and 0.14, 0.03 and 0.03, 0.2 and 3.3 SVG were used significantly high and RA were used low in aged group. Sequential bypass were under went 30.1% in aged group and 35.5% in controlled group. There was no operative death in elective operation, 5 (4.9%) was died in emergent operation. A favorable outcome may be expected when coronary bypass surgery with arterial graft is performed in 75 years and over aged group.