The aim of this study was to clarify the Dandori-ryoku (the ability for preparation in cooking) by analyzing the practical cooking behavior of sophomore female students. Ten sophomore female students were participated in the experiment to cook three kinds of food (cooking rice, making miso soup and fried vegetables). The behavior of the participants during cooking were videotaped and analyzed in detail later especially in relation to Dandori-ryoku. Such behaviors as “starting from cooking rice with the prospect of the whole cooking process", “prepare the cookware or seasoning near the worktop before ignite the stove burner", “perform multiple heating recipes in parallel to decrease the total cooking time" etc. were considered as Dandori-ryoku. Students with high knowledge about cooking and basic technical skills to cook showed higher level of Dandori-ryoku. Therefore in home economics study in the elementary and the secondary schools, more education will be required to learn precise knowledge and improve basic cooking skills.