According to an exemplary embodiment of the invention, a swing-type cover opening and closing device for a mobile phone, in which in which the mobile phone that is composed of a main body and a cover and where a hollow shaft formed in the cover is pivotably supported on the main body to pivot the cover in a clockwise or counterclockwise direction around the hollow shaft, includes: i) a fixation plate that is fixed to one side of the main body in correspondence with the hollow shaft, and includes a through-hole through which the hollow shaft passes and a ring-shaped protrusion integrally formed on the periphery of the through-hole; ii) a rotating body that has a disk shape with a hollow space, is pivotably joined to the ring-shaped protrusion, and is locked to the cover with the hollow shaft fitting in the hollow space; iii) a cover member that includes a support hole corresponding to the hollow space and is joined to the fixation plate while supporting the outer periphery of the rotating body through the support hole; and iv) an elastic unit of which both ends are pivotably joined to the fixation plate and the rotating body, respectively, to provide elastic force to the rotating body by rotation of the rotating body through the cover.