PROBLEM TO BE SOLVED: To cut an adsorbent by a simple equipment configuration in a step of cutting an adsorbent protruding from an end surface of a tubular case to a predetermined length, and to suppress adhesion of chips to the cut surface of the adsorbent. Further, a method for cutting the adsorbent and a cutting device are provided. A method for cutting an adsorbent used in an adsorption column, which comprises the following steps. (1) In the step of cutting the adsorbent, at least one place of the adsorbent extending from the end of the tubular case after the adsorbent 3 is inserted into one or more tubular cases 2. A cutting step of cutting by advancing the cutting blade 8 in a direction orthogonal to the axial direction of the tubular case, (2) separating the adsorbent cut by the cutting blade from the cutting blade. Process. [Selection diagram] Fig. 3【課題】筒状ケースの端面より突出した吸着材を、所定長さに切断する工程において、簡素な設備構成によって吸着材の切断がなされ、かつ、当該吸着材切断面に切屑の付着が抑制された、吸着材の切断方法および切断装置を提供する。【解決手段】次の工程を含む、吸着カラムに用いられる吸着材の切断方法。（１）前記吸着材を切断する工程であって、前記吸着材３を１以上の筒状ケース２に挿入した後、前記筒状ケース端部から延在する前記吸着材の少なくとも１ヶ所を、切断刃８を前記筒状ケース軸方向に対して直交する方向に進行せしめることで切断する、切断工程、（２）前記切断刃で切断された前記吸着材と前記切断刃とを離隔する、離隔工程。【選択図】図３
