A slide support mechanism included in a portable terminal includes: a first guide groove provided on a first housing side, and having a straight part parallel to the longitudinal direction of a display screen and an arc-shaped arc part continuous with one end of the straight part; and a first guide pin provided on a second housing side, and engaged with and held by the first guide groove in a slidable manner. Input parts which are covered by the second housing when the first guide pin is located at a cross-point between the straight part and the arc part are entirely or partially exposed in both cases of moving the first guide pin located at the cross-point between the straight part and the arc part along the straight part, and moving it along the arc part.