Abstract: A suitcase body of a hard suitcase includes an upper suitcase body having a top wall and upper side walls which form an upper cavity with an opened bottom, a lower suitcase body having a bottom wall and lower side walls which form a lower cavity with a closed bottom and an opened top, and a cover. Peripheries of the upper and lower suitcase bodies are connected in a permanently closed manner, and the upper and lower cavities are communicated with each other, and an access opening is defined in the top wall by removing a part of the top wall, the rest and a portion of the upper side walls form an installation area for installing partial wheels, the rest of wheels are installed on the lower suitcase body. Such a simple structure of the suit case is convenient to take and put articles, which is easy to operate.