The invention relates to a scraper blade assembly structure. The scraper includes a stem for hand grip and a scraping section in the front. The scraping section includes a jaw plate, a blade and a fastening button. The jaw plate extends backward to form an arm. The jaw plate is attached to the inside of the jaw plate groove of the scraping section by a fastener that also serves as a lever pivot for swinging back and forth. When a fastening button goes into the inside of the jaw plate of the scraping section, it pushes the inner side of the arm of the jaw plate, and so as to generate a great holding power for the front of the jaw plate. Further, the fastening button can be a handle protruding from one side of the scraping section.