Provided is a container for testing blood (lA) including: a main container body (2) having an internal space (3) that stores an initial blood flow a blood inflow port (5) that allows the initial blood flow to inflow a blood outflow port (6) that allows the stored initial blood flow to outflow a blood drawing part (21) that is connected to the blood outflow port (6) and allows the initial blood flow to be drawn and a first discharge part (7) that has a hydrophilic bacteria-impermeable first filter (12) and discharges air in the internal space, wherein the first discharge part (7) and the blood outflow port (6) are disposed at an end part of the main container body (2) on the same side, and the blood drawing part (21) connected to the blood outflow port (6) includes: a holder (22) whose one end is provided with the needle assembly (23) and whose other end has an opening (22c) in which a testing instrument storing the initial blood flow is inserted.
