To provide a spring for a slide type mobile terminal machine, which provides sufficient force for semi-automatic opening/closing of a cover for the mobile terminal machine by a spring structure such that a wire is not wound so as to be superposed in a plurality of stages and is folded/formed in the only one stage, minimizes the thickness, and is formed such that increase of the thickness of the mobile terminal machine due to installation of the spring is not substantially recognized, and also to provide a mobile terminal machine using this.

The spring for the slide type mobile terminal machine is constituted so as to include: a first elastic body 350A provided with a first curve section 310A folded in the arch form without superposing the wire in the case of spring and having tendency of elasticity returned to the original state if the curvature of the first curve section is varied; a second elastic body 350B provided with a second curve section 310B folded in the arch state without superposing the wire and having tendency of elasticity returned to the original state if the curvature of the second curve section is varied; and a connection body 330 for connecting the first elastic body and the second elastic body at an intermediate portion.