A test blood container (1) includes a container body part (2) including an internal space (3) configured to store initial flow blood used for a test, a blood inflow port (5) configured to let the initial flow blood inflow, a blood outflow port (6) configured to let the stored initial flow blood outflow, an exhausting part (7) including a hydrophobic bacteria-impermeable filter (12) and configured to exhaust air inside the internal space (3), and a blocking part (8) arranged to the exhausting part (7) and configured to make it possible to block introduction of air into the internal space (3).
