To fill and adhere a curing resin in a column, while leaving water as it is, in a method for reinforcing the column by removing the water left in the metallic hollow column with a lower end part embedded in concrete.

A hole is bored in the hollow column above an embedding part into the concrete. The curing resin having density higher than the water and superior in adhesion with a wetting surface, is injected from its hole. The staying water is made to flow out of the hole while substituting the staying water in the hollow column with the curing resin. The curing resin is filled up to the lower edge height of the bored hole, and the curing resin is made to adhere to the column.