The present invention provides a tablet having excellent shape stability in which the appearance change (swelling, cracking, cracking, etc.) due to moisture absorption is significantly suppressed even while the decontamination is contained at a high rate, and a manufacturing method thereof. The tablet of the present invention is (a) at 350 wt.This is characterized in that the content of the component (b) contained in 100% by mass of the tablet is 10 to 40% by mass, while it is a tablet containing 5% or more of the strength of 80 n or more, and (b) a reducing agent when it is measured by a tablet hardness meter.本発明は、崩壊剤を高割合で含有しながらも、吸湿による外観変化（膨潤、割れ、亀裂等）が有意に抑制されてなる、形状安定性に優れた錠剤、及びその製造方法を提供する。本発明の錠剤は、（Ａ）質量350 mg、12kNで成型（杵径：9.5 mmφ）し、錠剤硬度計で測定するとき80 N以上の強度を示す糖アルコール、及び（Ｂ）崩壊剤を含有する錠剤であって、素錠100質量％中の（Ｂ）成分の含有割合が10～40質量％であることを特徴とする。
