An oil film bearing for rolling roll consisting of a bushing in a roll chock bearing box and a sleeve tightly engaged with a rolling roll tapered neck to form a journal to the bushing is improved by that said sleeve is provided with a portion which projects from a smaller diameter end of the rolling roll tapered neck, a keyway is provided in an inner circumference of the projected portion of the sleeve and a holder, by which a radially inner end of the key inserted in the keyway is anchored, is provided at the smaller diameter end of the tapered neck.
