A shield drive device for a head lamp may include a shield deployed in front of a light source positioned in a lamp assembly to be opened and closed while rotating by using a hinge portion as an axis, an actuator connected to a shield arm through a shaft while being deployed below the shield to rotate the shield, a sliding contact member deployed to be close to the shield arm of the shield to provide friction contact force when the shield rotates, and a sliding stopper and a spring mounted on the shield arm of the shield and configured to decelerate and control a motion of the shield while being compressed or de-compressed while contacting the sliding contact member when the shield rotates.