The casing of a clamshell-type electronic device comprises a first casing and a second casing, wherein, the first casing is provided with a first clamping part; the second casing is provided with a fixing part, a tripping body, a clamping body and an elastic body; the tripping body comprises a tripping part, and at least part of the tripping part is exposed outside the second casing; the clamping body comprises a second clamping part matched with the first clamping part; the tripping body further comprises a pivoting part and a first transmission part; the tripping body is matched with the fixing part via the pivoting part, so that the tripping part can rotate around the pivoting part; the clamping body is made of elastic materials; the clamping body further comprises a second transmission part matched with the first transmission part; the elastic body is elastically connected with the tripping body; and the elastic body allows the tripping body to have a trend of turning around when the tripping body is rotated by applying force. The casing of the clamshell-type electronic device has the advantage of easy opening.