Abstract: This study used mix-method-sequential explanatory design with the analytical construction of quantitative-qualitative combination that supports the analysis. Quantitative approach was first applied with survey method and questionnaires as instruments to identify factors affecting the strengthening of sub-district power as well as the society’s response and perception toward sub-district functions. It was further investigated by qualitative approach to discover structural problems thoroughly. Qualitative data with interview method and focused group discussion were used for validation. Samples were obtained through multistage sampling including those of regions and individuals. In the initial phase, samples of sub-districts were selected based on purposive technique those with “Customary village” are taken as the analytical units. The result of the study shows that, the delegation of authority has been executed, yet it has not been optimum (60.40%). The functional implementation of the head of sub-district (Camat)’s duties is still considered inadequate, except for public service and village government supervision. On the other hand, the functions of sub-district appear to run smoothly (77.10%), particularly in terms of coordination with the regional work unit. In the “loading factor” model, coefficient value of each manifest-variable lies between 0.431-0.928 intervals with p<0.10.