To provide a charcoal-containing board wherein a hygroscopic effect for a long period of time and a minus ion-generation effect can be uniformly obtained while mixed charcoal powder is neither one-sided, nor scattered and though it is used at a position likely to be conspicuous such as a partition wall material, the appearance is not impaired.

After kneading powder charcoal 24 of 30-80 wt.%, a fiber material such as Manila hemp of 5-30 wt.% and a viscous material having vinyl acetate 28 as a main component, of 10-30 wt.%, the kneaded material is pressurized and formed into a plate form, and both surfaces thereof are covered by a skin material comprising a cardboard 26 having gas permeability and the like.