ELECTRONIC DEVICE

To selectively use an electronic device of glasses type or head unit type as needed, an electronic device comprising an optical driving unit including an image source panel configured to form image light, a display unit configured to display the image light formed by the optical driving unit to a user, a front frame configured to mount the optical driving unit and the display unit, a head unit selectively coupled to the front frame to be seated on a head of the user, and configured to form an electronic part, and a fastening module configured to fasten the head unit and the front frame, in which the fastening module includes a receiving part provided in the front frame, an insert part provided in the head unit and configured to be inserted into the receiving part to be fastened, and an elastic locking member provided in the receiving part to hold the fastening with a restoring force is provided.