The courses of intrusion into houses are classified as "infiltration"and"brought-in by residents'activities". The authors reported on the first subject in the previous paper. This paper reports the amount and the mechanism of cedar pollen which are brought in into dwellings or other buildings by residents' activities : those deposited on the people, those attached to the "futon", beddings, exposed to the sun, and laundry fabrics dried outdoor. The deposition on people was 10-30% of outdoor surfaces The deposited pollen on laundry can be estimated from the time stayed outside and from the outdoor pollen concentration and can be reduced to half by shaking five times before taken in. The concentration of allergens in surface dust on the"futon"can be reduced to 1/2-1/3 by beating them.
