Aim: To evaluate the functional result of early knee mobility in transverse patellar fractures treated with modified tension band wiring. Material and methods: This research was a prospective observational study including 50 patients who met the inclusion criteria and were treated with open reduction and internal fixation. Functional result was assessed at a 6-month follow-up and compared to the findings in the current body of research. The assessment of pain was conducted using a visual analogue scale. The research included patients aged 20 to 60 years with displaced transverse (two part) patellar fractures, who presented within 2 weeks after the injury. Only closed fractures with extensor mechanism lag at the knee were included. Results: The assessment of fractures was conducted based on clinical criteria, namely when painless movements could be performed without assistance and there was an absence of discomfort. Among the 50 patients, the fracture healed within 11 weeks in 17 of them. The current research found that the fracture was successfully healed at 13.5 weeks in 26 patients, whereas in 7 individuals, the fracture took 16.2 weeks to heal. The mean duration of union was 13.11 weeks.In the current research, after a 6-month follow-up, it was found that 40 patients had no discomfort, 5 patients experienced pain at the extreme range of motions, and 10 patients had pain that limited their ability to walk excessively. Among the 50 patients, 39 had a range of motion beyond 90 degrees, whereas 11 patients showed a range of motion below 90 degrees. Conclusion: The efficacy of MTBW in achieving stable fixation and facilitating early rehabilitation highlights its efficiency in the treatment of transverse patellar fractures.