Vis-a-vis the combination quantitative 100 mass sections of the polyamino acids building a bridge body, the natural polysaccharide being combined, 0.01 mass sections or more the increase viscous composition which features that it becomes. As for this composition, when mixing into water medium, it is possible to raise the viscosity rapidly, when it uses as make-up charge, the be it is not to be attached, the extension to the skin is superior, also the preservation moisture effect is high. As for this composition, from the fact that it is prescription of natural system, safety to the human body is high, is superior even in biodegradation characteristic.ポリアミノ酸類架橋体の配合量100質量部に対し、天然多糖類が0.01質量部以上配合されてなることを特徴とする増粘性組成物。本組成物は、水性媒体に混合したときにその粘度を飛躍的に高めることができ、化粧料として用いた場合に、べたつかず肌へののびが優れ、保湿効果も高い。本組成物は、天然系の処方であることから、人体への安全性が高く、生分解性にも優れている。