Disclosed herein is an electrode terminal connecting member for electrically interconnecting plate-shaped secondary battery cells ('battery cells') constituting a battery module, wherein the electrodeterminal connecting member includes a coupling part ('bent coupling part') bent to form a groove at the rear of the electrode terminal connecting member such that a plate-shaped electrode terminal ('battery cell electrode terminal') of each battery cell is inserted into the groove, an external input and output terminal protruding toward the front of the electrode terminal connecting member whilebeing bent, and a voltage detection terminal protruding toward the front of the electrode terminal connecting member while being bent.