The factors relating to pseudarthrosis after triple arthrodesis were analyzed in 301 feet. The primary factors associated with pseudarthrosis were poor contact of the joint surfaces being fused and early weight-bearing. Unrelated factors were age, anatomical deformity, disease entity, infection, total time in a plaster cast, and tendon transplantation in the early postoperative period. Most of the pseudarthroses occurred at the talonavicular joint and in patients who had simultaneous bilateral procedures.