Abstract: A bottom structure for cookware is disclosed. The bottom structure comprises a main plate, an aluminum plate and a cover. The main plate is provided at the peripheral portion of its top surface with a circular groove for holding the lower end of a main body and the peripheral edge of the cover, with the central portion of the main plate being dented. The aluminum plate is disposed in the dented central portion of the main plate. The cover is bent downwardly at its peripheral edge and is positioned on the aluminum plate with its downwardly bent portion inserted into the circular groove of the main body.