Reconstruction of cruciate ligament has been controversial. Autogenous grafts has been used with inconsistent success rates due to their variable strength and limited length. If any autograft could cover such drawbacks it could surpass the advantage of artificial ligaments also. Recently, we used partial Achilles tendon autograft in reconstructive operation of anterior cruciate ligament with promising result. The main advantages of this Achilles tendon autograft are its sufficient length and strength. Preliminary study was done in 11 patients who received reconstruction of the anterior cruciate ligament using partial Achilles tendon autograft. The results were as followings :l. Anterior cruciate ligament reconstructions were done in 11 patients, with follow-ups ranging from 5 to 12 months, average being 8 months. 2. Average preoperative knee score was 49.1, and it was improved up to 87.4 after operation. 3. Among the 11 patients, 6 belonged to the Excellent, 4 to good, and 1 to fair. 4. Achilles tendon autograft turned out to be a good autograft substitute for the anterior crucate deficient knee. The results were promising. Long-term follow-up is needed to confirm the final status of the operated knee.