Provided is an orally ingestible composition that has improved oral absorption of curcumin and / or its analogs, and can be produced simply and inexpensively. A complex of curcumin and / or an analog thereof and a water-soluble cellulose derivative.クルクミン及び/又はその類縁体の経口吸収性が改善され、かつ簡便で安価に製造できる経口摂取用組成物の提供。 クルクミン及び/又はその類縁体と水溶性セルロース誘導体との複合体。