Provided is a composition for preparing a soft capsule shell that includes a non-animal material, and more particularly a composition for preparing a soft capsule shell, which includes modified starch composed of modified waxy corn starch and modified waxy potato starch, thereby realizing a soft capsule shell having appropriate hardness and elastic strength and delaying a browning phenomenon. The composition includes modified starch composed of modified waxy corn starch and modified waxy potato starch at a weight ratio of 2:8 to 8:2, a modified starch hydrolysate, a gelling agent, a plasticizer and purified water.
