The present invention relates chitosan contains a high content, and hardness, disintegration property and abrasion loss chitosan powder and a method of manufacturing the same can be produced a chitosan-containing formulation which is excellent in resistance, as well as the provision of chitosan-containing formulation. A consists of chitosan or chitosan and water, a bulk density of not more than 0.25 g / mL or more 0.40 g / mL, and the volume particle size 50 m or less of the content is chitosan powder is not more than 3 vol% . The volume average particle diameter of the chitosan powder, aspects like is preferably 200 m or more 440 m or less.BACKGROUND【課題】キトサンを高含量で含み、かつ硬度、崩壊性及び耐摩損性に優れるキトサン含有製剤を製造可能なキトサン粉末及びその製造方法、並びにキトサン含有製剤の提供。【解決手段】キトサン又はキトサン及び水からなり、嵩密度が0.25g/mL以上0.40g/mL以下であり、かつ体積粒径50μm以下の含有率が3体積%以下であるキトサン粉末である。キトサン粉末の体積平均粒径が、200μm以上440μm以下である態様などが好ましい。【選択図】なし
