Abstract: An anti-kickback safety structure comprising both a pivoting guard over the cutting chain and a pivotable, lockable support lever projecting to the rear from the chain saw housing, having a strap and belt for securing the support lever to the forearm of the operator. The support lever automatically provides a counter-torque to restrain a kickback when the cutting chain encounters a knot or other hard object when cutting wood, and also facilitates one-handed support of the chain saw by automatically countering the torque exerted by the weight of the chain saw.