A method and an apparatus for producing a filler-containing substrate, as well as a substrate produced using the method, are disclosed. The substrate comprises a filler layer (201, 52, 801) and a seal layer (203, 51, 802). The method comprises: (a) forming holes in the filler layer (201, 52, 801)； (b) spreading fillers on a porous surface of the filler layer (201, 52, 801) that has undergone hole formation； (c) horizontally shaking the filler layer (201, 52, 801) having the fillers spread thereon so as to allow the fillers to enter the holes； and (d) sealing the filler layer (201, 52, 801) having the holes containing the fillers so as to obtain the substrate. The apparatus comprises: a hole-forming device (21, 71) for forming the holes in the filler layer (201, 52, 801)； a spreading device (23, 72) for spreading the fillers on the surface formed with the holes of the filler layer (201, 52, 801) that has undergone hole formation； a horizontal shaking device (24, 73) for horizontally shaking the filler layer (201, 52, 801) having the fillers spread thereon so as to allow the fillers to enter the holes； and a sealing device (25, 74, 312) for sealing the filler layer (201, 52, 801) having the holes containing the fillers.
