The present invention is a container-holding tray (1) for holding a plurality of bottomed cylindrical medical containers (50) arranged in a row. The container-holding tray (1) has a bottom surface part (2), and container-holding projection parts (4) formed on the bottom surface part (2) and used for holding the medical containers (50). The container-holding projection parts (4) have a tapered shape in which the upper-end side is narrow. A plurality of the container-holding projection parts (4) is disposed in a grid on the bottom surface part (2). Four container-holding projection parts (4) together form a container accommodation part (6) that corresponds to a single medical container (50). The medical container (50) is configured so as to be in contact with and held at any point of the four container-holding projection parts (4) from the upper end to the lower end.
