A support for the treatment of stable injuries of the lateral ligament of the ankle has been designed. One hundred and seventy-five consecutive patients with acute injuries were studied. Unstable injuries were excluded by the use of the radiological anterior stress test. One hundred and forty-four patients with stable injuries were randomly allocated to three treatment groups: double Tubigrip, eversion strapping and the new support. The change in the range of movement was used as an objective measure of improvement. The new support was noticeably better than Tubigrip and eversion strapping.