Brief case

The utility model discloses a brief case. The brief case comprises a case body and a case bottom, wherein a zipper is fixedly arranged at an opening of the case body, the case body sequentially comprises an outer layer, a metal mesh layer and an inner layer from inside to outside, an extension part is arranged on the upper end of the case body and is connected with the case body through two lock catches, the zipper is arranged on the inner side of the extension part, an inner flange is fixedly arranged at the bottom of the case body, and a clamping groove is formed between the inner flange and the case bottom; and the brief case also comprises a support plate, one end of which is articulated with the case bottom, and the rest edges of which are arranged in the clamping groove. The metal mesh layer effectively prevents articles in the case body from being lost after the outer layer of the brief case is gashed, and the antitheft property of the brief case is improved through dual locking of the zipper and the l