A slide type portable terminal is provided which can suppress a play, and can secure a predetermined strength, while the play may be easily produced between a portable condition and an extended condition of the slide type portable terminal by a coupling portion having a plurality of rails and a plurality of engaging portions Further, the respective rails are not exposed under swing condition of the slide type portable terminal.A portable terminal 10 is equipped with a coupling portion 30 which couples an upper housing 11 to a lower housing 12 and guides an operation condition thereof from the portable condition up to the extended condition; and a swing device 40 which relatively rotates the upper housing 11 and the lower housing 12. A coupling portion 30 contains a first rail 31 and a second rail 32, which are provided on a front face 12A of the lower housing 12; and contains a first engaging portion 33 and a second engaging portion 34, which are provided on a back face 11B of the upper housing 11. After the swing device 40 has released an engagement of the first engaging portion 33 with respect to the first rail 31, the swing device 40 relatively rotates both the upper housing 11 and the lower housing 12 by setting the second engaging portion 34 as a center so as to engage the first engaging portion 33 to the second rail 32.