Trenchless technology is increasingly being used as a viable alternative for underground excavations throughout the world. The conventional cut and cover method for laying utilities, though simple, poses several issues, such as diversion of the traffic, continuous pumping in high ground water table regions and associated settlement of structures in the vicinity, diversion of existing utilities, safety of workers due to soil collapse, cost and time overruns. This lecture covers the aspects of the trenchless technology with regard to laying underground services in densely populated urban areas.