Abstract: A guide device for shape rolling has upper and lower pairs of width-variable web guides arranged at the delivery of a shape mill. Support bases supporting the upper and lower pairs of web guides. Movable bases move the support bases horizontally on side frames whose ends are fixed to guide frames. Guide width adjusting devices individually adjust the distance between the movable bases; and guide height adjusting devices enable the side frames to ascend and descend. Preferably, upper and lower pairs of flange end guide rollers and flange-outer-surface guide rollers, which are adapted to roll while in contact with the end surfaces and the outer surfaces of the flanges, can move in the vertical and horizontal directions.