the present invention, there is at least 95% content of Rebaudioside A and stevia sweeteners, for stevia sweeteners 100 parts by weight, extract a derived from sugar cane of 0.25 to 5.15 parts by weight, extract b derived from sugar cane of 0.06 to 2.50 parts by weight, and 0.002 12.5 and a parts by weight of - amino butyric acid, it will provide stevia formulation.本発明は、レバウディオサイドAの含有量が95%以上であるステビア甘味料と、ステビア甘味料100質量部に対し、0.25~5.15質量部の甘蔗由来のエキスa、0.06~2.50質量部の甘蔗由来のエキスb、及び0.002~12.5質量部のγ-アミノ酪酸とを含む、ステビア製剤を提供する。