Abstract: A portable electronic apparatus which can be made compact and thin in the set thickness direction of the case while securing sufficient strength of the case. The portable telephone (1) has a substantially planar first case (3), and an underside case (2) connected to the first case (3) through a hinge portion (4). The hinge portion (4) has a fixed portion (21) being fixed in the first case (3) equipped with a sheet metal member (33) having a folded portion (34) where the end portion is folded in the thickness direction of the first case (3). The folded portion (34) of the sheet metal member (33) has screw holes (34a) and tightened to the fixed portion (21) concurrently by means of screws (28) inserted into the screw holes (34a) in the direction intersecting the thickness direction of the first case (3) perpendicularly.