The special risk constellation of renal transplant patients suffering from rupture of the Achilles tendon promoted the development of a therapeutic concept with early functional treatment. The significant differences to the methods usually employed so far are: local anaesthesia, additional interlacing of the tendon suture, and early functional after-treatment. In a total of ten patients, 15 spontaneous ruptures of the Achilles tendon were treated according to this therapeutic principle. Follow-up after an average of 26 months yielded in all cases a good to very good functional result. This treatment method avoids risk factors that can lead to secondary complications and is thus very suitable for treating spontaneous ruptures of the Achilles tendon in the renal transplant patient.