Case: This case report describes the occurrence of a squeaking knee joint on active flexion-extension in a 35-year-old man who had previously undergone posterior cruciate ligament (PCL) reconstruction surgery. The patient suffered from psychosocial distress because of the noise and complained of persistent left knee pain. After nonsurgical treatment failed to resolve the noise, arthroscopic surgery was performed to debride the interposed nonabsorbable suture located on the intra-articular surface, resulting in squeaking sound elimination. Conclusion:Surgery was necessary to alleviate a squeaking knee joint caused by interposed nonabsorbable sutures after PCL reconstruction in this patient. Disclosure: The Disclosure of Potential Conflicts of Interest forms are provided with the online version of the article (http://links.lww.com/JBJSCC/B824).This is an open-access article distributed under the terms of the Creative Commons Attribution-Non Commercial-No Derivatives License 4.0 (CCBY-NC-ND), where it is permissible todownload and share the work provided it is properly cited. The work cannot be changed in any way or used commercially without permission from the journal.