A double hinge module comprising: a first rotary cam which is rotatable on a first shaft; and a second rotary cam which is rotatable on a second shaft parallel with the first shaft in the reverse direction of the first rotary cam; characterized in that: a first coupling slot extended from one end of the first rotary cam in a direction which gets farther from the first shaft; a second coupling slot extended from one end of the second rotary cam which gets farther from the second shaft; a link having one end coupled to the first coupling slot and the other end coupled to the second coupling slot; a stopping projection projecting from the link; an elastic stopper provided on a linear movement passage of the stopping projection; and a guide plate comprising a guide slot extending in parallel with a central line connecting the first shaft and the second shaft with each other, wherein, when the first rotary cam and the second rotary cam are rotating, the link is linearly movable in parallel with the central line, wherein, when a force stronger than the elastic force of the elastic stopper is applied to the stopping projection, the first rotary cam and the second rotary cam rotate, and wherein the stopping projection is inserted in the guide slot and movable in a direction in which the guide slot is extended. a first rotary cam which is rotatable on a first shaft; and a second rotary cam which is rotatable on a second shaft parallel with the first shaft in the reverse direction of the first rotary cam; characterized in that: a first coupling slot extended from one end of the first rotary cam in a direction which gets farther from the first shaft; a second coupling slot extended from one end of the second rotary cam which gets farther from the second shaft; a link having one end coupled to the first coupling slot and the other end coupled to the second coupling slot; a stopping projection projecting from the link; an elastic stopper provided on a linear movement passage of the stopping projection; and a guide plate comprising a guide slot extending in parallel with a central line connecting the first shaft and the second shaft with each other, wherein, when the first rotary cam and the second rotary cam are rotating, the link is linearly movable in parallel with the central line, a first coupling slot extended from one end of the first rotary cam in a direction which gets farther from the first shaft; a second coupling slot extended from one end of the second rotary cam which gets farther from the second shaft; a link having one end coupled to the first coupling slot and the other end coupled to the second coupling slot; a stopping projection projecting from the link; an elastic stopper provided on a linear movement passage of the stopping projection; and a guide plate comprising a guide slot extending in parallel with a central line connecting the first shaft and the second shaft with each other, wherein, when the first rotary cam and the second rotary cam are rotating, the link is linearly movable in parallel with the central line, wherein, when a force stronger than the elastic force of the elastic stopper is applied to the stopping projection, the first rotary cam and the second rotary cam rotate, and wherein the stopping projection is inserted in the guide slot and movable in a direction in which the guide slot is extended.