PURPOSE: To improve application efficiency of a burying conduit in the synthetic resin flexible pipe which is used to protect communication cables during the cabling work of the communication cable by simplifying the cabling work to improve the efficiency thereof and also enhancing installation density of communication cable in the conduits already buried.

CONSTITUTION: A multiple flexible pipe for protecting communication cable is formed by integrating a plurality of flexible pipes through the sequential coupling, via a thinner hinge, of the side end section of one side formed like an arc of the flexible pipe having the cross-section consisting of one side 4 formed like an arc and linear one side or V-shaped linear two sides 5.