PROBLEM TO BE SOLVED: To provide a plasma separation device that reduces blood cell components contained in blood.SOLUTION: A plasma separation device 1 comprises: an inflow port 3 into which blood flows； a connection channel connected to the inflow port； a first channel 9 connected to the connection channel； and a second channel 11 connected to the connection channel. The first channel is a channel connected to an inflow port 23 of a medical device body 21, the second channel is a channel connected to an outflow port 25 of the medical device body, and blood in the first channel has a lower ratio of blood cell components than blood in the second channel.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2020,JPO&INPIT【課題】血液に含まれる血球成分を軽減する血漿分離装置を提供する。【解決手段】血漿分離装置１は、血液が流入する流入口３，流入口と接続された接続流路，接続流路に接続された第１の流路９，及び接続流路に接続された第２の流路１１を有し，第１の流路は，医療機器本体２１の流入口２３と接続される流路であり，第２の流路は，医療機器本体の流出口２５と接続される流路であり，第１の流路中の血液は，第２の流路中の血液より血球成分の割合が少ない。【選択図】図１
