In a roll baler (1), a roll shaping section (5) includes an endless transport unit (3) and a plurality of rollers (4). The endless transport unit (3) is provided to extend to a rear position beyond a lower end portion (B) of the roll forming section (5) below a rotation center (C). The plurality of rollers (4) are arranged in an arc form from a rear side of the endless transport unit (3). A crop transported to a rear end of the endless transport unit (3) is pressed against the rollers (4), is pushed up by rotation of the rollers (4), and is rotated by its own weight and rotation of the rollers (4) to form a small roll (71) in an initial state. Then, the roll (71) is increased in size by crops transported sequentially.
