A mineral material processing plant, comprising a frame; a first screen unit; a feeder; wherein the first screen unit is pivotably supported on the frame and connected at a first end thereof to the frame with a first support arm, the first support arm being configured to lower and raise the first end of the first screen unit; the second end of the feeder is pivotably connected at a second end thereof to the first end of the first screen unit with a second support arm, the second support arm being configured to allow relative movement of the first screen unit and the feeder; and wherein the feeder is pivotably connected to the frame with a third support arm; the third support arm comprises a telescopic support arm configured to allow the lowering of the feeder into a transport position and to allow adjusting the angle of the of the feeder; characterized in that the mineral material processing plant comprises a second screen unit positioned above the feeder; and in that: the telescopic support arm is configured to allow the lowering of the feeder and the second screen unit into a transport position and to allow adjusting the angle of the of the feeder and the second screen unit; the second screen unit comprises a sub-frame; the second screen unit is pivotably supported at a first end thereof on the sub-frame and connected at a second end thereof with a fourth support arm to the sub-frame; and the fourth support arm is configured to allow decreasing and increasing adjustment of the angle of the second screen unit by allowing respectively lowering and raising of the second end thereof. a frame; a first screen unit; a feeder; wherein the first screen unit is pivotably supported on the frame and connected at a first end thereof to the frame with a first support arm, the first support arm being configured to lower and raise the first end of the first screen unit; the second end of the feeder is pivotably connected at a second end thereof to the first end of the first screen unit with a second support arm, the second support arm being configured to allow relative movement of the first screen unit and the feeder; and wherein the feeder is pivotably connected to the frame with a third support arm; the third support arm comprises a telescopic support arm configured to allow the lowering of the feeder into a transport position and to allow adjusting the angle of the of the feeder; characterized in that the mineral material processing plant comprises a second screen unit positioned above the feeder; and in that: the telescopic support arm is configured to allow the lowering of the feeder and the second screen unit into a transport position and to allow adjusting the angle of the of the feeder and the second screen unit; the second screen unit comprises a sub-frame; the second screen unit is pivotably supported at a first end thereof on the sub-frame and connected at a second end thereof with a fourth support arm to the sub-frame; and the fourth support arm is configured to allow decreasing and increasing adjustment of the angle of the second screen unit by allowing respectively lowering and raising of the second end thereof. the telescopic support arm is configured to allow the lowering of the feeder and the second screen unit into a transport position and to allow adjusting the angle of the of the feeder and the second screen unit; the second screen unit comprises a sub-frame; the second screen unit is pivotably supported at a first end thereof on the sub-frame and connected at a second end thereof with a fourth support arm to the sub-frame; and the fourth support arm is configured to allow decreasing and increasing adjustment of the angle of the second screen unit by allowing respectively lowering and raising of the second end thereof.