To remove a contaminant more effectively and efficiently by virtue of an appropriate and exact heating.
When removing at least one of volatile contaminant, non-volatile water soluble contaminant, non volatile and water insoluble contaminant which are all maintained underground, a pouring well PW and a suction well SW are separately provided within a range from an area in which the removing is carried out to its adjacent area, thereby pouring a heated fluid G from the pouring well PW and performing a suction through the suction well SW, thus removing the contaminant. The heated fluid G is poured to the removing area from a pouring position which is a specified position in the depth direction of the pouring well PW, with such pouring position being sealed with a packer 6, 6 fore and aft.
KITAMURA KAZUYA
KINOSHITA YOSHITOMO
