Abstract:[Objective] To introduce the surgical technique and preliminary outcomes of taking out broken guide wire in femoral neck with intramedullary bone endoscopy. [Methods] Between March 2011 and May 2020, 7 patients had broken guide wire in femoral neck re- moved by intramedullary bone endoscopy in our department. After imaging check to determine the depth of the broken wire, the original fixed cannulated screw was taken out, and the original bone tunnel was enlarged with a cannulated drill, which stopped as just beyond the distal end of the broken wire under X-ray fluoroscopy. As the arthroscope was introduced into the bone tunnel, the broken wire was identi- fied with a small curett. A grasp forceps was introduced into the tunnel to hold the retained wire, and pulled back to take out the broken wire. Finally, bone grafts were inserted into the tunnel. [Results] All patients underwent successful operation with operation time of (23.30± 3.90) min, blood loss of (16.20±4.40) ml and the distance between proximal bone tunnel and articular surface of (1.80±1.00) cm. Radio- graphs at the latest follow-up showed bone union in the bone tunnel graft area with no loosening of fixation or bone resorption around fixa- tion, and no femoral neck fracture. The Harris score was of (84.40±4.64) at the latest follow up. [Conclusion] Removal of broken guide wire in femoral neck with intramedullary bone endoscopy is efficient, and has benefits of minimalizing iatrogenic trauma, no additional damage to the tunnel, and maintaining the original internal fixation.