<；P>；PROBLEM TO BE SOLVED: To suppress environment deterioration caused by urination of a companion animal dog. <；P>；SOLUTION: A marking post 1 comprises as followings: city water is flown into a base part 9 through a flow-in pipe 13 from outside, the city water is flown through the flow-in pipe 13 extending to a control part 8 connected with the base part 9 to produce ozone water with an ozone water generating device 17 in the control part 8, the ozone water flows in a flow-in pipe 12 continuing from the control part 8 to a spurt-out hole support 7 and spurts out from a spurt-out hole 12a of the spurt-out hole support 7, and the spurted out ozone water runs to a recessed part 63 of a canopy part 6 set opposing to the spurt-out hole support 7, flows in the recessed part 63 of the canopy part 6 and flows out to a column part 72 of the spurt-out hole support 7 so as to wash out from the column part 72 of the spurt-out hole support 7 to the base part 9. <；P>；COPYRIGHT: (C)2008,JPO&INPIT
