An active roll control device utilizes a driving torque to move a suspension arm side connection point of a stabilizer link that connects both sides of a stabilizer bar with a suspension arm along a sliding unit such that roll of a vehicle is actively controlled. The sliding unit includes a linear shaft that extends in a vehicle width direction in a housing on the suspension arm, a linear bushing into which the linear shaft is inserted to be slidably moved along the linear shaft in the housing, and a bushing housing that is fixed on an external circumference of the linear bushing, a double ball joint is fixed on an inner side thereof to connect the bushing housing, and the double ball joint is connected to a drive shaft of the drive source through one end of a push rod and a lower end of the stabilizer link.