A rapid, uniform and high-quality thawing method is awaited which is free from a burn and boiling and which is indispensable for a freezing technology that is frequently used in the fishery industry and the fishery processing industry. For rapid thawing, electromagnetic waves of 130 to 300 MHz in which a B zone passage required time serving as a rate limiting step is decreased are utilized, for uniform thawing, electromagnetic waves of 110 to 170 MHz are utilized and in order to prevent boiling and a burn in the application and after the thawing, electromagnetic waves of 110 to 160 MHz in which a temperature increase after the thawing is decreased are utilized, with the result that the corresponding problems can be solved.
