In recent years, manpower saving is strongly demanded for train maintenance, and, in this connection, train rubber hoses have to be used in service for longer periods and distances. In order to examine whether the service life of train rubber hose can be extended, properties of train rubber hoses were tested. As a result, it has been proved that the service of train rubber hose can be extended to 7.5 × 10⁵km in terms of the running distance, and very careful attention should be paid on the elongation of service time in urban and suburban lines.