Spontaneous regression of an osteochondroma of the distal femur is unusual. This report highlights the spontaneous regression of a sessile osteochondroma of the distal femur in a 9‑year‑old boy which resolved over a 4‑year period. The mechanism underlying regression of the tumor is discussed with a review of previous reports. Since this type of osteochondroma can spontaneously resolve, conservative treatment is always the first choice to avoid unnecessary surgery.