PROBLEM TO BE SOLVED: To provide a liquid composition suppressed in crystal deposition of caffeine and excellent in appearance stability, and to provide a capsule formulation filled with the composition.SOLUTION: There is provided a liquid composition comprising caffeine and a cellulose derivative. The cellulose derivative is one or more selected from alkylcellulose, hydroxyalkylcellulose, hydroxyalkylalkylcellulose, an ester of hydroxyalkylalkylcellulose, carboxyalkylcellulose or a salt thereof, a carboxyalkylcellulose derivative and carboxyalkylalkylcellulose.COPYRIGHT: (C)2013,JPO&INPIT【課題】カフェイン類の結晶析出が抑制され、外観安定性に優れた液状組成物及び該組成物を充填したカプセル剤の提供。【解決手段】カフェイン類及びセルロース誘導体を含有する液状組成物。【選択図】なし