The invention discloses a travel suitcase which comprises a suitcase, an infant bracket mechanism and a suitcase cover, wherein the suitcase cover capable of being opened and closed is arranged at the front end of the suitcase; the infant bracket mechanism is arranged at the rear end of the suitcase; the suitcase comprises a main body with the front end being opening, an expander, two adjusting mechanisms and a groove; the expander is fixedly connected with the main body through the two symmetrically arranged adjusting mechanisms; the groove, into which the rear end of the expander can be inserted, is formed at the front end of the main body; each adjusting mechanism comprises two first grafting components, a mounting base, two sleeves, two positioning mechanisms, a pull rope, a slide rod and a button cap; the mounting base is arranged on an inner wall of the expander; the sleeves are arranged at upper and lower ends of the mounting base; the first grafting components are arranged in the sleeves; the rear ends of the first grafting components are fixedly connected with the inner wall at the rear end of the main body. Compared with the prior art, the travel suitcase has the advantages that the storage space of the suitcase can be adjusted according to the storage requirement, the infant can sit on the travel suitcase and the use is labor-saving and convenient.