Abstract: Apparatus for removing obstructions from pipelines, such as sewers, comprises support means, motor means carried by the support means, cutter means adapted to be operated by the motor means, and means for locking the support means in a pipe, adjacent an obstruction whereby the apparatus may be locked in a predetermined position, and the motor means operated to drive the cutter means and remove the obstruction. The motor means may comprise an hydraulic motor. The cutter means may be a rotary saw. The means for locking the support means in position may comprise at least one hydraulic jack.