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A Tunnel is a underground passageways completely enclosed except for openings for doorway commonly at the end. They used for transportation and could be used for carrying freights and passengers, water and sewage etc. some recent tunnels have immersed tube construction techniques. They served many different functions � highway , railroad, pedestrian passageway, water supply , hydropower generator or utility corridor . the aid of a protective shield in free or compressed air and they will eventually be constructed in many ways now. Its length can vary from less than 100ft to more than 30 mile . Tunnel structure opening creates subterrestial may pass through a hill, under buildings or roads intact cities. Tunnel may be commenced from the bottom of a vertical shaft or from the end of a horizontal tunnel steered predominantly for construction ingress called an adit. In Tunnel underground chambers , may varied offen blend with a multiple tunnels and gradually are being used for several things in the recess ore � processing plants , warehouses, and light manufacturing and further specific needs. In this research document we will discuss about analysis of tunnel. Its phraseology,scope,advantages,disadvantages,types of tunnel , design and conclusion.