NOVELTY - The device (10) has a container (12) which is provided with an inlet port (22) and exit unit (24). A purifier (14) is arranged in inside of container and is arranged between the inlet port and the exit unit. A drift suppressing board (16) is protruded inside of the container from a surrounding wall portion (17) of the container, while arranging the drift suppressing board between the edge portion side of the inlet port and edge portion side of the exit unit. The drift suppressing board is provided along the circumferential direction of the container.    USE - Purification device used as heating desulfurizer and hydro-desulfurization device used in fuel cell system.    ADVANTAGE - The drift suppressing board is protruded inside of the container from the surrounding wall portion of the container, while arranging the drift suppressing board between the edge portion sides of inlet port and exit unit, and is provided along the circumferential direction of the container, such that the lifetime of the purification device is prolonged.    DETAILED DESCRIPTION - The drift suppressing board is annularly extended along the circumferential direction of the container. The drift suppressing board vacates preset interval for direction of the flow of the fluid in inside of container. The drift suppressing board is formed in plate shape for making direction of flow of fluid in inside of container along thickness direction. The drift suppressing board and container are formed in different structure. The drift suppressing board is integrally formed with the container. The protrusion amount from the surrounding wall portion of the container is set, so that the flow-rate distribution of the fluid is passed uniformly in drift suppressing board and purifier.    DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of the purification device.    Purification device (10)    Container (12)    Purifier (14)    Drift suppressing board (16)    Surrounding wall portion (17)    Inlet port (22)    Exit unit (24)