An electronic device is provided. The electronic device includes a first housing including a first surface and a second surface, a second housing including a third surface and a fourth side, a folding portion, a flexible display disposed on the first surface and the third surface across the folding portion, and a hinge including a first planar portion disposed on the second surface, a second planar portion disposed on the fourth side, and a hinge center portion, wherein a first configuration where the folding portion is unfolded and the first housing and the second housing are parallel, and wherein a second configuration where the folding portion is folded and the first planar portion is at least partially inserted into the first housing and the second planar portion is at least partially inserted into the second housing and the first housing and the second housing are parallel.