The invention relates to a roller cylinder (1) comprising band rings (6) which are attached to a center axis (17, 17a, 17b). The roller cylinder comprises at least two band ring segments (14, 14a, 14b) consisting of an outer, substantially circular portion (15), an inner portion (16) and a radial portion (18) extending substantially radially between the inner and outer portions, said inner portions of the band ring segments being fixed by means of fastening means, such as screws (19, 20, 19a, 20a, 21a, 19b, 20b, 21b), to the center axis and abut the center axis at least at the attachment points of the fastening means between the inner portion of the band ring segments and the center axis. The invention also relates to a band ring segment included in a roller cylinder provided with band rings.
