Abstract: An electric blind includes a frame, a plurality of horizontal slat units, and a stepping motor. The frame has two side vertical rods pivotally connected with the slat units, and a linking rod is fixed with a lengthwise side of all the slat units, possible to force the slat units synchronously swing for an angle. The stepping motor unit is composed of a stepping motor and a controller. The stepping motor is positioned in a cavity of one of the two side vertical rods, connected with a slat of the salt units. Further the controller controls the rotating angle of the motor, and the stepping motor can rotate idle in case the motor should meet an exterior force (for example, in case of the slat units already swung to the largest angle), or the slat units are manually moved any time. Thus the electric blind may not easily be broken or damaged.