Due　to　difficulty　in　obtaining　human　cornea,　pigs　are　often　adopted　as　substitute　models　for　cornea　research　because　they　are　considered　to　have　eyes　similar　to　humans.　The　purpose　of　this　study　is　to　understand　the　similarities　and　difference　in　the　biomechanical　properties　between　human　cornea　and　porcine　cornea.　20　human　cornea　specimens　and　30　porcine　specimens　were　used　for　uniaxial　test　by　Instron　apparatus.　Their　tensile　strength,　stress-strain　relationship,　relaxation　properties　were　tested.　The　tensile　strength　and　stress-strain　relation　were　very　similar　in　the　two　kinds　of　specimens　while　significant　differences　were　observed　in　the　stress　relaxation　relationship:　under　the　comparable　stress　and　elongation　level,　porcine　cornea　relaxed　much　more　significantly　than　human　cornea.　If　tensile　strength　and　stress-strain　were　the　only　mechanical　factor　to　be　investigated,　porcine　cornea　could　be　used　as　a　substitute　model　for　human　cornea　research.　However,　when　stress　relaxation　factors　were　concerned,　the　biomechanical　properties　were　quite　different　in　the　two　species.　In　conclusion,　porcine　cornea　cannot　be　used　as　a　model　for　human　corneas　in　mechanical　property　studies.