A pressing and baling machine (1) for compression of vegetable fibres into a compressed round bale (7) comprises a frame (2), on which is assembled a pressing chamber (5, 6) equipped on its internal circumference with rotatable rolls (15) for rotation and pressing of the bale (7). The pressing chamber (5, 6) consists of a lower chamber part (5) and an upper chamber part (6) which are displaceable in relation to each other so as to free an area of the bale (7) allowing the body to be packaged in elastic plastic foil. The lower pressing chamber part (5) is connected to a lower frame section (3). The upper chamber part (6) is connected to an upper frame section (4), and two frame sections (3, 4) are displaceably interconnected. The upper chamber part (6) is rotatably supported in relation to the frame (2) around a vertical axis (9) when the chamber parts are at a distance from each other. At least one retaining arm (11) is attached to the pressing chamber part (7) for a roll (13) of packaging material, for packaging of the bale (7), so that the retaining arm (7) rotates with the upper chamber part (6) and during rotation issues packaging material to the bale (7).