The processing machine (1) is adapted to carry a processing tool driven by a motor and includes a safety shield (4) adapted to at least partly shield the processing tool in relation to a user. The safety shield (4) is arranged displaceably away from its shielding position and a magnetically activatable safety arrangement (14) includes a safety switch (15) being operable between a passive state in which the motor (2) is allowed to operate and an activated state in which the motor is prevented from operation. The safety switch (15) is arranged to switch from its passive state to its activated state when the safety shield (4) is displaced away from its shielding position. At least one magnet (16) is arranged to hold said displaceable safety shield (4) in its shielding position and at the same time hold the safety switch (15) in its passive state.