This article describes a case of bilateral congenital knee dislocation treated with bilateral total knee arthroplasty. The patient had pain and disability while walking before the operation. Implants used in the surgery were constrained stems and they were applied with bone cement. After 6 years of follow-up, her joint range of motion at both knees was satisfactory and she was pain-free. The patient's Knee Society Score and Functional Score improved from preoperative values of 12 and 0 for the right knee and 20 and 0 for the left knee to postoperative values of 55 and 15 for the right knee and 65 and 30 for the left knee. In the late presenting cases of the congenital knee dislocation, total knee arthroplasty has proved to be one of the treatment options with satisfactory outcomes.