An electronic device with a hidden I/O interface module is disclosed. The electronic device includes a container and a surface with an opening, container and the opening communicate with each other. The container includes a first position and a second position. The electronic device also includes an I/O connection unit, a pivot module and a cover. The I/O connection unit is disposed at the container, electrically connected to the electronic device and includes a connecting surface. The pivot module is connected to the I/O connection unit. The cover is connected to the pivot module. When the cover is shut, it covers the container and makes the I/O connection unit located at the first position. When the cover is open, it drives the pivot module to drive the I/O connection unit to move to the second position to make the connecting surface of the I/O connection unit aligned with the surface.