PURPOSE: To accomplish pollution removing work remotely and automatically in a safe manner by allowing the moving of a sucking pollution removing section through a wire hanging from an arm overhung from the top of a truck while a support piece is provided on a piping abutting a wall surface to remove pollution.

CONSTITUTION: A sucking pollution removing section 2 moves vertically with an electric winder 5 being put tight on a side wall surface 1 with an action of a support piece 10. Here, as a hose 9 hangs from a horizontal arm 7, it does not suffer radioactive pollution without touching not only the side wall surface 1 but also a floor surface. Moreover, a truck 4 is movable horizontally freely and can remove pollution on the entire side wall surface sequentially. In addition,the sucking pollution removing section 2 is put tight on the wall surface 1 in balance with a support piece 10 thereby enables the performing of a sufficient pollution removing function even when a running accuracy of the truck 4 is not so high.