PURPOSE: To provide the subject inexpensive base paper bearing performance comparable to or higher than those of conventional such papers, without the need for using, as feedstock, inorganic fibers such as expensive ultrafine synthetic fibers or glass fibers which have been traditionally used in order to enhance dust collection rate while maintaining suction power.

CONSTITUTION: The objective base paper can be obtained by putting a feedstock incorporated with 5-45wt.% of waste paper pulp to wet papermaking process. This base paper has the following characteristics: (1) air permeability: 0.1-0.4 sec; (2) burst strength: 1.5-3.0kg/cm2; and (3) having defibrability. Owing to the characteristic 3, broke, etc., produced during base paper production and/or processing can be recycled through its disaggregation and recovery. Besides, because of the absence of inorganic fibers in the feedstock, indoor air pollution never occurs due to such inorganic fibers falling off the filter during use of a vacuum cleaner and discharging together with exhaust gas.