A multi-functional device and a method of storing a transmission list of users in the same. The multi-functional device includes an authenticator to authenticate one or more users, a storage unit to store a transmission list of the authenticated users, a user interface to display the transmission list of the authenticated users, a controller to read the transmission list of the authenticated users stored in the storage unit and to control the user interface to display the read list, and a communication interface to transmit and receive data. The controller controls the communication interface to transmit and receive the data to/from a transmission address, which is selected from the displayed transmission list by the user interface. When a multi-functional device is used to transmit scanned data to an electronic mail address or an Internet address, the transmission address can be selected from a recently transmitted electronic mail address list or a recently transmitted Internet address list of authenticated users such that an address desired by a user can be set up instead of directly inputting the address. Accordingly, a transmission address list of users is managed, thereby preventing the transmission address list from being discarded or deleted by other people using the multi-functional device.