A carding machine comprising a carding cylinder and a revolving card flat assembly comprising revolving card flat bars, the machine further having a lateral slideway assembly comprising a first curved slideway and a second curved slideway and upon which ends of the card flat bars can slide with a part on said first slideway and a part on said second slideway, wherein said first slideway has a first sliding-contact surface and said second slideway has a second sliding-contact surface wherein said first sliding-contact surface is curved such that its distance from an axis of said cylinder increases in a circumferential direction about the axis, and said second sliding-contact surface is curved such that its distance from the axis decreases in the circumferential direction.