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 ,a first transmission part and a butting 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 second casing is provided with an elastic function part, and the one end of the elastic body is acted on the butting part, and the other end thereof is acted on the elastic function 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.