To provide a straightening apparatus for a band like plate material which allows effective cleaning (or changing) of work rolls and back up rolls in a short time.

In the straightening apparatus for the band like metal plate material including work rolls 1 and back up rolls 2 extending to a pair of facing stands 2 in contact with each other, slide bases 9 are attached to chocks 4, 5 supporting the work rolls and the back up rolls at both ends, rails 10 to slide the slide bases are arranged in a stand side, the work rolls, the back up rolls and the chocks are, as integrated, slid to be pulled out.