To provide a motor unit of an electric solar shading device which is capable of reducing the generation of noise.

A motor unit of an electric solar shading device has a base member of the motor unit which is attached at the end of a rail for transporting a solar shading material, the motor unit accommodating a motor, and transports the solar shading material along the rail by an operation of the motor unit, wherein the motor 8 is attached to a metal fitting 26, the metal fitting 26 is attached to the base member 15 through vibration-proof materials 21, 30, and 31, and a motor case 7 accommodating the motor 8 and the metal fitting 26 is attached to the base member 15.