To provide an electric driven desk lamp electrically operating a light head by using a timing belt connected with a driving motor.

The electric driven desk lamp comprises a driving motor generating a rotary power by using an electric force, a transmitting means transmitting the rotary power to a separated position, a housing having a predetermined coupler as supporting the driving motor, an operating switch operating the driving motor, a main control board controlling the driving motor according to the operating switch, a light head gear physically coupled with the housing through the predetermined coupler and receiving the rotary power of the driving motor through the transmitting means, and a light head coupled with the light head gear and having a lamp socket and a reflector.