Abstract
The structure of living things seems to be optimized so that they can adapt to the environment. Especially the research on the dragonfly wing has possibilities to give a suggestion for making lightweight and high rigid engineering structures. The purpose of this research is to investigate the structure of dragonfly wing from the viewpoint of structural dynamics with the pursuit of smart engineering applications. We perform detailed observation of wing structure and dynamical properties by microscope and vibration test. Finally we make an appropriate FEM model.