To provide a connection structure for electrically and pneumatically connecting railway vehicles or pantographs of a train, improved such that handling is easy.

This connection structure (1) for connecting power supply lines across a gap between the railway vehicles includes: at least one flexible power line (2); and at least one flexible fluid line (3). The at least one power line and the at least one fluid line are preassembled such that an integral structure is formed so as to provide the improved connection structure easy to be handled wherein reliability is increased, for electrically and pneumatically connecting the railway vehicles or the pantographs of the train.