To provide a hydraulically driven razor which uses an energy source of low environmental load, which is free from the risk of electrification and short circuit, which is easy to maintain due to simple structure and which is excellent in portable use since it can be used wherever only the faucet of running water exists.

A water feeding path and a drain path are formed communicated with each other within a housing 2 holding a movable blade block, a water feeding hose 6 having a coupler 5 for faucet connection for feeding running water is provided at the water feeding path and an impeller to be rotated with the fed running water is provided within a closed space where the water feeding path and the drain path are communicated with each other to drive the movable blade block linked with the rotation of the impeller.