To provide a method of repairing a high temperature component by a coupon with which a damaged site of the high temperature component is repaired in a short period of time at a low cost, and also to provide a high temperature component having the coupon.

A joint is formed on a peripheral part of a main body of the high temperature component which is made of a nickle base alloy or a cobalt base alloy, is used in an energy engine operated at a high temperature and is required to be of a high static and/or dynamic strength. A plate-like coupon member is made of a material substantially same as the material of the main body of the component, and a joint having a shape to be fitted to the joint on the peripheral part of the main body of the component is formed on a peripheral part of the coupon member. The joint of the coupon member is joined to the joint of the main body of the component to integrate the coupon member and the main body of the component. When the coupon member is damaged, the damaged coupon member is separated from the main body of the component at the joint, and a new coupon member is installed.