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 () that accommodates a collected biological specimen, a filter () for filtering a predetermined component in the biological specimen, and a holding instrument () that accommodates the filtered predetermined component, where the holding instrument is configured to be inserted into the accommodation instrument (), a sealing member () is provided in an outer circumference of the holding instrument () on the tip side in the direction of insertion to to be movable in the accommodation instrument (), in a state of being in liquid-tight contact with an interior wall of the accommodation instrument (), the filter () is held to the holding instrument () by a holder () forming a biological specimen inflow port () to the filter (), and in a case where the filter () and the holding instrument () are cross-sectionally viewed, the sealing member () is positioned on a side opposite to the direction of insertion from an imaginary line () from an end part of the filter (), where the imaginary line () is in contact with a tip side end part (A) on an opposite side across a center of the filter ().