Introduction: An open fracture of the tibia has been one of the most common long bone injuries. Soleus muscle flap supply can be a remedy for this kind of soft tissue difficulties. The soleus muscle flap’s blood supply may help in the construction of a longer, safer, and more functional flap. When the incision is clinically fit for covering, the flaps from the same leg are elevated between 0 and 14 days following the damage. In the majority of these cases, the flaps are covered with a split-thickness skin graft taken from the anterior aspect of the thigh in the same sitting. This can be a great solution. Aim of the study: The study aimed to assess the effectiveness of soleus muscle flap for the coverage of wound in open tibia fracture in the mid shaft. Methods: This prospective interventional study aimed to evaluate the outcomes of early coverage using the soleus muscle flap in the management of Gustilo type-IIIB fractures of the mid-shaft tibia. The study followed a quasi-experimental design and was conducted over an 18-month period from January 1, 2010, to June 30, 2011. The research took place in the Department of Orthopaedics and Traumatology at Dhaka Medical College Hospital (DMCH) and the National Institute of Traumatology and Orthopaedic Rehabilitation (NITOR) in Dhaka. The study population included all 15 patients admitted to the hospitals with clinical and radiological evidence of open Gustilo type-IIIB fractures of the mid-shaft tibia followed by the inclusion and exclusion criteria. Informed written consent was taken before data collection and confidentiality was maintained. The analysis was done by SPSS version 15. Result: Among 15 patients most (12) were male, 3 were female. Mean age was 38 ± 12 years. Majority were in 31-45 years. Male female ratio was 4:1. The selected study subjects were predominantly motor driver (26.66%), followed by day labor, housewife, service holder, farmer, and businessman (each was-13.33%), and student was 6.66%. ...