Abstract: A golf bag has an opening at an upper end thereof and includes several horizontal tube units secured in the opening of the bag, several spacer cloth units hung respectively on the tube units so as to divide the interior space of the bag into several chambers, and a fixing unit including several inflatable air bladders attached respectively to the tube units and located in the opening of the bag. The fixing unit further includes an air pump member having an end portion equipped with a check valve through which air can enter into the air pump member, a piping intercommunicating the other end portion of the air pump member and all of the air bladders, and a pressure relief valve interposed between the air pump member and the piping and capable of being actuated to permit escape of air from the fixing unit.