The present invention provides a lid for a tube for the life sciences that can be handled efficiently, a tube set, and a cell separation method. Provided is a lid 32 that has a recess 34 on the surface that is on the tube side when attached, wherein the bottom surface 34a of the recess 34 is flat and has a circular shape or a polygonal shape having four or more sides, and a side surface 34b comprises a surface that is inclined in a direction that widens from the bottom surface 34a toward an opening. Further provided are a tube set consisting of the lid 32 and a tube 50 that is used in combination therewith, and a cell separation method using said lid 32.
展开▼
