PROBLEM TO BE SOLVED: To provide a connector for a bag for sealing therein a blood product heat/cold insulation agent to comparatively simply form a housing space capable of holding a blood product at a proper temperature, with a degree of high freedom.SOLUTION: A connector 10 for a bag for sealing therein a blood product heat/cold insulation agent comprises a connection part 14 which is detachably attached to each bag for sealing therein a blood product heat/cold insulation agent and interconnects the peripheries of the plural bags attachably and detachably.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2017,JPO&INPIT