PURPOSE: To obtain the composite paper applicable to acidic and basic gases, easy to regenerate and excellent in deodorizing performance by making the porous glass fiber and activated carbon fiber into paper through a fibrillated org. fiber for a binder.

CONSTITUTION: The porous glass fiber contg. ≥ about 96wt.% SiO2 and having ≤50 pore diameter and ≥400m2/g specific surface, the phenolic activated carbon fiber having 10-20 pore diameter and 1000-2000cm2/g specific surface and excellent in adsorptivity and the fibrillated org. fiber for a binder selected from polyamide, cellulose, polyester, etc., fibers are used. The ratio of the porous glass fiber to activated carbon fiber is controlled to (1:3)-(3:1), and the content of org. fiber is preferably adjusted to about 5-10wt.%. The porous glass fiber adsorbs basic gases, and the activated carbon fiber adsorbs acidic gases. Since the porous glass fiber and activated carbon fiber are mixed, composite paper excellent in deodorizing performance and easy to regenerate is obtained.