Abstract: An automatic transaction machine storing apparatus for storing a plurality of automatic transaction machines. The apparatus includes a plurality of entrances for respectively carrying the automatic transaction machines therethrough into a customer room. The entrances are provided in front of set positions of the automatic transaction machines. A machine room defined behind the customer room has a space for maintenance of each automatic transaction machine or cash exchange. Furthermore, the apparatus further includes a plurality of security sensors provided on an outer panel of the apparatus to detect an external attack and a control unit for rotationally driving a rotating table on which each automatic transaction machine is mounted at a required angle according to information output from the security sensors, thereby orienting a security panel standing on the rotating table toward an attacked position to secure the automatic transaction machine against the external attack.