The invention relates to a transportable biological water-flushed toilet cubicle. The inventive cubicle (Fig. 1) is configured as a fully double-walled cubicle. The hollow space between the outer wall and the inner wall (Fig. 2) is divided into two parts by an intermediate bottom. The upper part is used as the fresh water tank, the lower part as the waste water tank. The double-walled structure of the inventive cubicle provides an optimum protection against heat and cold. The inventive biological toilet provides perfectly hygienic conditions anywhere and at all times. In order to keep the cubicle in function, fresh water needs only to be regularly replenished and the cubicle needs to be cleaned. If the cubicle is connected to a water pipe, the cubicle needs only to be kept clean. The cubicle can be produced in shapes and sizes other than those shown in the drawings. The cubicle is closed by means of a hinged door, sliding door, etc.