To provide a rolling frame with which the deformation of a rolling mill is reducible.

This housing is a frame for the rolling mill in which a pair of vertical rolling posts 10', 11' are joined in both end parts of horizontal beams 12', 13' and the end parts (for example 30) of the rolling posts 10', 11' where are joined to the beams 12', 13' are outward curved. In such a case, a bend part caused by the bending stress of the beam is generated in the curved end region of the post. It is desirable to form the beam to become thinner toward its end parts.