Background: Fractures of the patella are one of the most common fractures encountered by an orthopedics and trauma centers. It is also difficult to restore the desired anatomical continuity and congruity of the articular surfaces after reduction and thereby causing complication like stiffness of the joint, prominent hard ware,non-union, infections and OA. Surgical fixation is tension-band wiring technique. The aim of this study is to study the knee stiffness of patellar fractures and associated factors after fixed with tension band wiring. Objectives: To assess knee stiffness of patellar fractures & associated factors after fixed with tension band wire in TGSH and FHCSH from August-1-2019 to August-1-2022. Methods: A cross-sectional study was used to conduct the study on patients of 243 samples that were admitted at TGSH and FHCSH and who get orthopedic surgical care from August-2019 to August-2022.The study populations were Patients admitting with a diagnosis of patellar fractures. Collected dated were recorded review in sheet. SPSS version 25.0 for analysis. Simple-multiple binary regression studies were used for detecting the associations between variables. P Value < 0.05 was used to determine the association of variables and or with 95% CI was used to determine the strength. Bivariated and multi variated analysis were used. Result: In this study the magnitude of poor knee stiffness of patellar fractures after fixed with tension band wiring was found to be 11.5%. Follow up (AOR: 7.82, 95%CI: 1.770, 29.96), Time during arrival (AOR: 10.004, 95%CI: 1.10, 90.86), Age (AOR: 12.85, 95%CI: 1.144, 144.36), And Infection (AOR: 6.71, 95%CI: 1.653, 27.29) were the factors significantly associated with knee stiffness. Conclusion: This study showed that the overall poor knee stiffness of patellar fractures after fixed with tension band wiring was low in this study area, lack of follow up, Time during arrival, patients aged between 61 up to 80 years and infection were factors significantly associated with poor knee stiffness of patellar fractures after fixed with tension band wiring. Key word: Patella Fractures, tension band wiring, knee stiffness.