The present invention provides an electronic device, an external input device and a method for connecting the electronic device and the external input device. An electronic device according to various embodiments comprises: a camera module; a communication module, a display, a memory; and a processor electrically connected to the camera module, a communication module, a display and memory, wherein the processor displays, on the display, images comprising a left-eye image and a right-eye image, determines whether or not a connectable external input device is present if an event for the connection with the external input device occurs with respect to the images, displays, on at least one part of the display, external images, obtained by means of the camera module, if a connectable first external input device is present, and can perform connection with the first external input device. Moreover, other embodiments are possible.