A moisture- or protein- adsorbability imparting agent, comprising a porous silica having a hexagonal pore structure, an average pore size of from 0.8 to 20 nm, an average particle size of 50 nm to 100 µm, a specific surface area of from 400 to 2000 m 2 /g, and a pore volume of from 0.1 to 3.0 cm 3 /g； a material having an adsorbability of moisture or a protein, comprising the moisture- or protein-adsorbability imparting agent； and use of the moisture- or protein-adsorbability imparting agent for imparting absorbability of moisture or a protein to a material selected from the group consisting of food wrapping materials； filtration aid agents； sanitary articles； compositions containing a synthetic resin； moisture-controlled material； covering materials for wounds； insulation substrates； coating materials for semiconductor devices； cosmetics； inkjet recording media； and compositions containing synthetic fibers.
