Since inception in 1983, Islami Bank Bangladesh Ltd.(IBBL) has been playing vital role in Bangladesh economy & last two decades, the average annual growth of the bank is about 30 percent. In addition, IBBL rendering social services to the generally ignored poverty-stricken households from the banking services. The branch-wise performance estimation study investigated relative efficiency of different branches of IBBL by employing panel data during 2003-2007. Result show that the average cost & profit efficiency of the bank is 82 to 84 and 86 to 94 percent during the study period, which implies...