To provide a hair growth brush which shows a strong hair-growth effect by impregnating sufficiently the hair roots and the follicle cells in the scalp with a hair growth tonic and massaging them.

A flat plate-like tank 9 is fitted unitedly on the opposite side of a brush face 1 of this brush. On the jointed surface of the two, numerous small holes are bored. Each of these holes is made to communicate with each of discharge bristles 6b. The tank 9 and a container 4 are connected with each other through a rubber tube 10. A solenoid 11 is mounted on the rubber tube 10 between the tank 9 and the container 4. The solenoid 11 pressurizes the rubber tube 10 to stop the drainage of the hair growth tonic from the container 4. A vibration motor 12 is fitted on this hair growth brush to vibrate the bristles 6. The brush face 1 is connected to one end of a DC power source 13. The other end of the DC power source 13 is connected to a grip electrode 2. The solenoid 11 and the vibration motor 12 are connected with a controller 14 through a switch 11a and a switch 12a respectively.