Recently, many kinds of natural disasters such as earthquakes and floods have happened in the world. It is so important to be able to do the rescue very quick so that we may survive from the disaster. In order to recover network of roads and/or infrastructure, the new emergency bridge that can be rebuilt up to be quick is needed. There has never been this type of a folding bridge. So, we propose the creation design for a new emergency bridge called “a mobile bridge". In this research, we produce the prototype of the mobile bridge, and investigate the vibration property and basically physical behavior by the structural experiments.