Provided is a jelling agent composition, in the case of preparing a jellylike food, said jelling agent composition being capable of quickly gelling the food after dissolved in the food without requiring heating and cooling, not hardening the gel with the lapse of time and imparting to the food no undesirable taste at such a level as causing troubles. Also provided is a food that contains the jelling agent composition. The jelling agent composition according to the present invention comprises 5-25 mass% of sodium alginate, 2-10 mass% of calcium citrate, 0.4-2.5 mass% (on the anhydrous basis) of citric acid and an excipient, wherein the content ratio of calcium citrate to citric acid (calcium citrate/citric acid) is 2-5.本發明提供一種凝膠劑組成物及含有該凝膠劑組成物之食品，該凝膠劑組成物，在調製凝膠狀食品時不需要進行加熱與冷卻，在使其溶解於食品後，能夠迅速地使食品進行凝膠化，並且凝膠不會經時性地變得過硬，且不會賦予食品會造成問題程度的異味。本發明的凝膠劑組成物，含有5~25質量%的海藻酸鈉、2~10質量%的檸檬酸鈣、以無水基準計為0.4~2.5質量%的檸檬酸、及賦形劑；其中，檸檬酸鈣與檸檬酸的含有質量比(檸檬酸鈣/檸檬酸)是2~5。
