1. Agricultural machine (11) comprising its own rotating member (40) rotatable during operation of the agricultural machine (11), characterized in that it comprises a protection device having a mechanical sensing element (25) disposed in front of the agricultural machine (11) and adapted to be actuated by the possible obstacles to motion of the sensor, and a mechanism (37) stop, comprising a locking element (64) which is connected with a mechanical cal sensor element (25) and can be actuated selectively to mechanically stop the toothed member (45) directly associated with the rotating element (40) to stop its own rotating member (40) when said obstacle affects the mechanical sensor element (25) .2. Agricultural machine according to claim 1, characterized in that the mechanical sensor element (25) is a rod disposed substantially horizontally so as to overlap substantially the entire width of the agricultural machine (11) or most chast.3. Agricultural machine according to claim 2, characterized in that the rod (25) attached to two levers (21, 22) adapted rotatably to the supporting structure (13) of an agricultural machine (11) and thus rotatably on certain angle (a) between an inactive position and a position srabatyvaniya.4. Agricultural machine according to claim 2, characterized in that the rod (25) is normally maintained in an inactive position by an elastic member (30) and1. Сельскохозяйственная машина (11), содержащая собственный вращающийся элемент (40), выполненный с возможностью вращения во время работы сельскохозяйственной машины (11), отличающаяся тем, что содержит устройство защиты, имеющее механический чувствительный элемент (25), расположенный в передней части сельскохозяйственной машины (11) и выполненный с возможностью приведения в действие посредством возможного препятствия на пути движения чувствительного элемента, и механизм (37) останова, содержащий стопорный элемент (64), который соединен с механическим чувствительным элементом (25) и может быть
