Biological specimen separation instrument

Abstract

There is provided a biological specimen separation instrument with which a biological specimen can be stably separated into a predetermined component. The biological specimen separation instrument includes an accommodation instrument () for accommodating a collected biological specimen, a filter () for filtering a predetermined component in the collected biological specimen, and a holding instrument () for accommodating the predetermined component filtered by the filter (), where the holding instrument () is configured to be inserted into the accommodation instrument (), in which the filter () is provided on a tip side of the holding instrument () in a direction of insertion into the accommodation instrument (), a sealing member () is provided in an outer circumference on the tip side of the holding instrument () in the direction of insertion to allow movement in the accommodation instrument (), in a state of being liquid-tightly brought into contact with an interior wall of the accommodation instrument (), and the sealing member () has a Shore A hardness of 20 or more and 90 or less and has a residual siloxane concentration of 1 wt % or less.