Abstract: Toilet block for a composting toilet which includes a toilet bowl and, situated below this, a holder for receiving night-soil delivered via the toilet bowl and for removing completely or partially broken down night-soil. The toilet block is prefabricated and designed in two parts in the form of an upper part, which is intended to accommodate at least one toilet bowl, and a lower part which is intended to accommodate a holder for receiving and composting night-soil delivered via a toilet bowl in the upper part. The upper part and the lower part are dimensioned such that the two parts can be situated one inside the other in a position for transport and storage. When the toilet block is being installed, the upper part can be lifted and secured relative to the lower part in a raised position in which the ceiling of the lower part becomes the floor of the upper part.