PROBLEM TO BE SOLVED: To simultaneously release a volatile agent and remove formaldehyde and to hold effect of the volatile agent and removability of formaldehyde.
SOLUTION: A formaldehyde removing ingredient which reacts with formaldehyde and a volatile agent which has no reactivity with the formaldehyde removing ingredient are carried on the same or different hydrophilic porous bodies and are stored in a container and amt. of water absorption per apparent surface area of the hydrophilic porous body on which the formaldehyde removing ingredient is carried is at least 1 g/100 cm2.