PURPOSE: To facilitate sticking work by arranging a plurality of ferrite plates lengthwise and crosswise in the shape of a grid to combine, and fixing the whole perimeters of side edges of the ferrite plates with a resin material.

CONSTITUTION: A plurality of square ferrite plates 1 are arranged lengthwise and crosswise in the shape of a grid by keeping slight gaps of approximate 1-5mm, and the whole perimeters of side edges of the ferrite plates 1 are fixed with a resin material 2 to form a solid plate. In addition, when the ferrite plates 1 whose edges are ground are used, cuts are made in corners to form coarse faces, so that the come-off of the ferrite plates 1 is prevented. Accordingly, A wave absorbing wall can be easily manufactured with a reduced number of processes.