Abstract: A machine for the renewal of railway tracks adapted to replace old rails and/or old sleepers with new rails and/or new sleepers.This machine comprises two frames connected by a swivel and resting on a front, middle and rear bogie. The equipment for the removal of old rails is disposed between the front and middle bogie, and the equipment for the removal of old sleepers, the renewal of the ballast, the laying down of new sleepers and new rails, is located between the middle bogie and the rear bogie. The middle bogie is equipped during the working cycles with a carriage means capable of progressing on the old sleepers still in service but deprived of rails, which sleepers act as a lateral guiding means for said carriage means.