The quickfreezing apparatus includes conductive shelf boards 11 each of which placing a thick food material thereon, a food material-loading carriage 10 having insulators 12 electrically insulating the shelf boards 11, electrodes 20 each inserted and disposed into the vicinity of the center of the thick food material; and an electric field-forming device 30 applying alternate high-voltage electric field on the food material-loading carriage 10 and the electrodes 20. 肉厚食材を載せ置く導電体の棚板11と、棚板11を電気的に絶縁する絶縁体12を備えた食材載荷台10と、肉厚食材の中心付近に差し込んで配設する電極棒20と、食材載荷台10と電極棒20に対して交番高圧電場を印加する電場形成装置30を備える。 - 特許庁