Provided is an X-ray module assembly for a portable X-ray device, in which an X-ray tube is made of a carbon nano tube or a filament-type tube, preferably, a carbon nano tube, high-voltage capacitors and high-voltage diodes are arranged space-intensively, fine control of X-ray emission may be achieved by molding the above-configured X-ray module within a case having a reduced size and a reduced weight with thermosetting resin, preferably, epoxy-based resin, more preferably, soft epoxy-based resin, so that radiation exposure to a user may be minimized, power consumption may be greatly reduced, the X-ray module assembly may be downsized and lightened, an insulation effect is excellent, and the X-ray module assembly may be used semi-permanently. The X-ray module for a portable X-ray device includes an X-ray tube, a high-voltage transformer structure, a plurality of high-voltage capacitors, and a plurality of high-voltage diodes, and is fixedly supported by a tube guide.
