A protective knee covering which provides motion guidance and orthotic support for a knee. The protective knee covering is made from a layer of rigid material, such as a plastic or a composite material. A central portion of the protective knee covering covers the knee cap portion of the knee. The central portion is curved in a top to bottom direction, but is flat or substantially flat in a medial side to lateral side direction to provide a stable base for kneeling. A medial side portion and a lateral side portion are attached to the central portion at angles. The lateral side portion is attached at a sharper angle than the medial side portion. Both of these portions cover the sides of the knee. The lateral side portion acts as an orthotic guide during bending of the knee to keep the thigh over the knee.