<p>A masking member for use in masking holes during surface treatment consists of an inserting part (110), and a flange (120), formed at the base of the inserting part (110) wherein the inserting part (110) has a shape which is adapted partially to contact the inner wall of a hole into which the inserting part (110) is inserted. When the masking member is used, the inserting part (110) of the masking member is inserted into a hole of an article and the flange of the masking member covers the surroundings of the hole. Thus the inside and the surroundings of the hole are protected from a surface treatment and the removing of the masking member after the surface treatment from the hole may be very smooth since the inserting part of the masking member has a shape which partially contacts the inner wall of the hole.</p>
