A functional expansion apparatus for connecting an electronic apparatus having a first connector, to an external apparatus that expands a function of the electronic apparatus includes a frame movable between a first position and a second position, a connector cover including a second connector connectible to the first connector, the connector cover moving with the frame so that the first and second connectors are connected to each other when the frame is located at the first position, and the first and second connectors are disconnected from each other when the frame is locate at the second position, and a lock part for locking the electronic apparatus when the frame is located at the first position, and for unlocking the electronic apparatus when the frame is located at the second position.