Provided is a hard capsule. The provided hard capsule includes water-soluble cellulose ether, about 0.5 parts by weight to about 1.5 parts by weight of a gelation agent based on 100 parts by weight of the water-soluble cellulose ether, and about 0 parts by weight to about 0.3 parts by weight of a gelation aid based on 100 parts by weight of the water-soluble cellulose ether, wherein the hard capsule comprises a body and a cap that seals the body, and a ratio of a maximum thickness to a minimum thickness of the body and the cap is each 2.5 or less.一種硬膠囊。硬膠囊包括水溶性纖維素醚、以100重量份的水溶性纖維素醚計,約為0.5重量份至約1.5重量份的凝膠劑、以及以100重量份的水溶性纖維素醚計,為約0重量份至約0.3重量份的助凝劑,其中硬膠囊包括主體,以及密封主體的蓋子,且主體與蓋子的最大厚度與最小厚度的比率各自為2.5或更少。100‧‧‧硬膠囊110‧‧‧主體111、121‧‧‧頂部112、122‧‧‧肩部113、123‧‧‧圓頂部114、124‧‧‧切刃部120‧‧‧蓋子d1、d2‧‧‧距離
