Anteriior cruciate ligament injuries are known to be the most common spots injuries, and ACL reconstruction is widely used because of the low success rate of convservative treatment. This study was aimed to compare the short-terma functional results of modifying transtibial and transportal technique for femoral tunnel drilling. This Retrospective comparative case control study included 76 patients with an isolated ACL tear, operated with ST tendon autograft ACL reconstruction by the same surgical tea. 36 patients operated with a modified transtibial approach and 40 patients with an antreomedial approach for femoral drilling. The results of the current study revealed that the mean age in the series was 26 years; the majority of patients were male, only 6 patient's asses again after two years of surgery, by instability tests and lysholm scores reveal no significant differences between two group regarding anterioposterior and rotatory instability, also comparable lysholm score results. The Study concluded that modified transtibial femoral drilling of the femoral tunnel in ACL reconstruction surgery is still useful and give comparable results as tranportal drilling (AU)