A processed konjac food having blood glucose increase suppressing effect is provided. The processed konjac food having blood glucose increase suppressing effect contains a konjac having a pH in a range of 2.5 to 7.4 and a rare sugar as active ingredients, is intended for ingestion of the rare sugar at a daily dose of 0.3 to 50 g/day for suppressing blood glucose increase, and is shaped into a rectangular, thread, round, grain, or plate form. The blood glucose increase effect can last for at least one day after one-time ingestion. For example, by making a konjac containing a rare sugar into a processed food, the product can be adapted to any consumer preferences without impediment upon eating or drinking, and therefore, a long-term ingestion is facilitated and the blood glucose increase suppressing effect can be sustained for a long period.本發明提供一種具有抑制血糖值上升的效果的蒟蒻加工食品。本發明的蒟蒻的加工食品,含有pH在2.5~7.4的範圍的蒟蒻與稀有糖作為有效成分,可攝取用於抑制血糖值上升而攝取之稀有糖一日用量0.3~50g/日、具有抑制血糖值上升的效果,整形為方塊狀、絲狀、丸狀、粒狀或板狀。藉一次攝取,可使抑制血糖值上升的效果持續一天以上。例如,藉由製成加入了稀有糖的蒟蒻的加工食品,無飲食時的障礙,符合消費者的嗜好,因此容易長期攝取,可長期維持抑制血糖值上升的效果。