The invention relates to a seal box arranged in a seal and convenient to carry, and belongs to the technical field of office supplies. The seal box comprises a seal box body and is characterized in that the seal box is composed of an upper box, a lower box and a transmission device; the upper box and the lower box are mounted in a close fit mode; the transmission device is mounted between the upper box and the lower box; and the thickness of the combined seal box is about 10 mm. The seal box and a corresponding seal body and seal handle are designed in a combined mode, thus the combination thickness of the whole set of seal is about 10 mm, and the problem that the seal cannot be put into a document bag is solved; and the seal boxes can be connected, and thus the seal bodies are not prone to being lost.