The purpose of the present invention is to provide: a separation improvement agent for causing the decline in quality during storage such as a deterioration in separation performance to be less than experienced in the prior art, and for manufacturing delicious grain processed food； and cereal processed food in which the separation improvement agent is used. A separation improvement agent for cereal processed food is added, whereby the separation performance of the cereal processed food can be improved, the separation improvement agent for cereal processed food being characterized in containing a bean-derived water-soluble hemicellulose and one or more polysaccharides selected from the group consisting of guar gum, carrageenan, locust bean gum, tamarind, tara gum, cassia gum, xanthan gum, succinoglucan, pectin, carboxymethyl cellulose, alginic acid, and derivatives thereof as a viscosity modifier, and having a solution viscosity at 20 DEG C of 100-2000 mPa·s when added or used for surface treatment.本發明目的在於提供一種鬆散改良劑及使用該鬆散改良劑的穀類加工食品，鬆散改良劑是用於較以前進一步抑制於保存中鬆散性劣化等品質下降，而有效率地製造美味的穀類加工食品。本發明藉由添加如下穀類加工食品用鬆散改良劑而可改良穀類加工食品的鬆散性，其特徵在於：含有源於豆類的水溶性半纖維素以及作為黏度調整劑的一種或兩種以上的選自瓜爾膠、角叉菜膠、刺槐豆膠、羅望子、刺雲豆膠、肉桂膠、三仙膠、琥珀醯聚糖、果膠、羧甲基纖維素、海藻酸及其衍生物的組群中的多糖類，且進行表面處理或添加時的溶液黏度於20℃下為100 mPa·s～2000 mPa·s。
