To provide a lesion model by which training can be carried out by assimilating the physical property of a lesion model to the physical property of an actual lesion site when carrying out the training for improving the skill of a surgical operator using the lesion model with the lesion model arranged in a vessel having a luminal part such as a blood vessel and which can be arranged in an optional shape in an optional position in the luminal part.

The lesion model 21 is arranged in the luminal part of the vessel having the luminal part such as a right coronary artery 4 and has a shape for narrowing or occluding the right coronary artery 4 when being arranged in the right coronary artery 4.