Abstract: A face guard accessory adapted to be attached to a motorcycler's helmet for protecting and shielding the nose, mouth and lower portions of the face from rocks, dirt and other flying debris encountered in riding. The face guard includes a shield portion removably attached to the helmet by a pair of side members slidably inserted in respective anchor clamps which are rigidly fastened to the exterior of the helmet. The anchor clamps are provided with respective threaded fasteners which engage the slidable side members and enable the user readily to attach and remove the shield portion and adjust its degree of forward extension as desired. Vent openings are provided in the shield portion of small enough dimension to prevent the entry of gravel, rocks and similar gross flying particles while permitting the passage of air.