PROBLEM TO BE SOLVED: To provide a liquid applicator that facilitates handling and eliminates the need to be separated and discarded after use.SOLUTION: The liquid applicator comprises: a cylindrically extended body having an opening port at one end and mounted with a porous body having impregnating ability to the other end a bottle filled with a chemical and having a mouth part sealed with a sealing material and a roughly cylindrical connection body for connecting the body and the bottle. The connection body is formed with: a screw-like part to be screwed with the mouth of the bottle in the inner surface thereof a projected rib movable to be linked to the opening port in the outer surface thereof. In the opening port, a roughly S-shaped guiding groove for guiding the projected rib is formed in the sidewall thereof, and a middle shelf is formed in the inner surface thereof. An inner cylinder, having a sharp tip and a hole formed in the inner surface of the middle shelf to break the sealing material, is formed in the direction of the mouth part along an axis.
