An improved mobile toilet structure may include a base, four side bars, four sleeve tubes, four panels and a lid. The base has four threaded holes at four corners of the upper side of the base, and a vertical exhaust pipe at one side of the rear portion of the base. The side bar has a first threaded portion on its upper end and a second threaded portion on its lower end. The sleeve tube has an opening on one side and the two margins of the opening extend outwards and form two wing-like structures. Among the four panels, the front one has a board installed in the panel that can be opened and closed, whereas all others may have transom windows opened at their upper portions. The lid is integrally molded, with its size and shape determined by the base.