An electronic device and a method for recognizing accessories that are mounted into a connector of an electronic device are provided. The electronic device includes a housing that includes a first surface that faces in the first direction and a second surface that faces in the second direction, opposite the first direction, a display that is disposed between the first surface and the second surface and is exposed through the first surface, a power supply unit that applies a voltage, and at least one processor that is electrically connected to the display, wherein: the housing includes a universal serial bus (USB) type-C connector, the connector includes a contact substrate that is electrically connected to the processor to detect the insertion of an accessory, and the power supply unit and the processor are electrically connected to a mid plate that is formed in the contact substrate.