Abstract: A stropping device of a blade for safety razors, capable of allowing an existing razor blade to be repeatedly used, is disclosed. The stropping device consists of a main body and an adhesive sheet attached on the back surface of the main body. A guide groove part is longitudinally formed on a front portion of the main body, while a protrusion is integrally and horizontally formed on a top portion of the main body. Also, side walls are formed at both side ends of the main body in such a manner that their outer surfaces are smoothly curved. A stropping plate member, produced from a leather material such as a natural or synthetic leather or suede, is attached on the bottom surface of the guide groove part by an adhesive means. In addition, a recess is formed on a rear portion of the protrusion in such a manner that a nail, driven in a wall in a house, is inserted into the recess.