This study was performed to investigate the macroanatomy of the heart and coronary artenes in the domestic cat and White New Zealand Rabbit. Adult twelve females and eighteen males of either species were used in this study. Latex injection and corrosion cast methods were applied to the materials. It was found that the heart lied between Ihe second and fourth ribs in the rabbit, and the fourth and seventh nbs in the cal. The left coronary artery was stronger than the right coronary artery in both rabbit and cat. The left coronary artery gave off the septal, left marginal ventricular and left posterior ventricular branches in the rabbit. II gave off the paraconal interventricular and left circumflex branches in the cat. The right coronary artery was found to be constituted only by the right circumflex branch in both species. The conal branch, which arised from the right coronary artery, directly arised from the aorta in two cats and one rabbit, it was observed that the subsinuosal interventricular branch was formed by the right circumflex branch in four cats.