1. A mower-conditioner-type machine, comprising a frame (1) on which a grass mowing mechanism is installed, equipped with a cutting device (3), a grass conditioning system (4) and means (5) for lifting these elements relative to the frame (1), this mowing and conditioning unit is equipped with a casing (13), and the specified machine further comprises a grass ejection tunnel (14) located in the immediate continuation of the conditioning system (4), characterized in that the casing (13) is pivotally connected to the tunnel (14) by the transverse axis (17) mounted on top of the machine and emnogo back system (4) crushing the grass, and the tunnel (14) pivotally connected to the frame (1) .2. A machine according to claim 1, characterized in that the transverse axis (17) is installed in the machine at the level of the entrance of the tunnel (14) and in its upper part. A machine according to claim 1, characterized in that the size of the transverse axis (17) essentially corresponds to the width of the machine between the wheels (9). A machine according to claim 1, characterized in that the tunnel (14) is pivotally connected to the frame (1) by means of at least one rod (18), one end of which is fixed to the structural transverse beam of the frame (1), and the other end is connected with the upper outer part (15) of the tunnel (14) .5. A machine according to claim 4, characterized in that the rod (18) is equipped at its two ends with ball bearings (19) to provide a flexible swivel connection with the frame (1), on the one hand, and with the back of the tunnel (14), on the other parties. 6. A machine according to any one of claims 1 to 5, characterized in that the tunnel (14) is equipped at its end with a grass deflector (20), the position of which remains essentially unchanged regardless of whether the cutting unit (3) and the device are (4) conditioning in the raised position or in the lower position1. Машина типа косилки-плющилки, содержащая раму (1), на которой установ