A protection case and an electronic device using the same are provided. The protection case includes a base cover in which an electronic device including a main display is accommodated, a flip cover, which includes an auxiliary display on a front surface portion of the flip cover, and a connection portion, which connects the flip cover to the base cover. When the main display is covered with the flip cover, the flip cover is converted to a closed position. When the main display is exposed, the flip cover is converted to an opened position. When the flip cover is in the closed position and the auxiliary display is hidden, the auxiliary display is converted to a first position, and when the flip cover is in the closed position and the auxiliary display is exposed, the auxiliary display is converted to a second position.