A portable electronic apparatus includes a first body, a rotating structure, a supporting element, and a second body. The first body includes an upper surface. The rotating structure combines with the first body and rotates relative to the first body around a first axis which is substantially perpendicular to the upper surface. The supporting element combines with the rotating structure and rotates relative to the rotating structure around a second axis which is substantially parallel to the upper surface. The supporting element includes a main structure and at least one sliding portion disposed at the main structure. The second body includes at least one corresponding sliding portion disposed corresponding to the at least one sliding portion. The second body movably combines with each sliding portion of the supporting element through each of the corresponding sliding portions, such that the second body slides relative to the supporting element.