An electronic apparatus system comprises an electronic apparatus body such as a portable computer, and an extension station for use in extending the functions of the electronic apparatus body. The extension station has a mount portion on which the electronic apparatus body is detachably mounted, a device storage section in which an extension device for extending the functions of the electronic apparatus body is removably stored, and an ejector for discharging the extension device from the device storage section. The ejector has an eject lever manually operable at the time of discharging the extension device. The eject lever has an operation section exposed to the mount portion. The extension station includes a rotatable cover which is held in a closed position by an extension portion of the cover which extends toward the mount portion of the extension body. The extension portion of the cover is located under the portable computer when the portable computer is mounted on the mounting portion.