Secure cutting tool comprising - an electrically conductive cutting member, - a motor for actuating the cutting member, electrically controlled, - a handle for gripping the cutting tool by the hand of a user, the gripping handle being electrically insulated from the cutting member, - a control for triggering cutting actuatable by the hand of the user gripping the gripping handle, the control for triggering cutting being electrically insulated from the cutting member, - an emergency stop device sensitive to a contact of a user with the cutting member, - characterised by: - at least one first and at least one second electrode for manual contact (32, 34), the first electrode for manual contact and the second electrode for manual contact being electrically insulated from one another and created on at least one out of the handle for gripping the tool and the control for triggering cutting, - a first electric circuit comprising the first electrode for manual contact, a first electric impedance and the cutting member, the first electric circuit being capable of being closed, during a simultaneous contact of the user with said first electrode for manual contact and the cutting member, - a second electric circuit comprising the first and the second electrode for manual contact (32, 34), the first electric impedance and a second electric impedance, the second electric circuit being capable of being closed during a simultaneous contact of the user with the first and the second electrode for manual contact (32, 34), - at least one device (56, 58) for measuring an impedance characteristic of the first electric circuit and an impedance characteristic of the second electric circuit, - a comparator of the impedance characteristic of the first electric circuit and of at least one threshold characteristic that is a function of the impedance characteristic of the second electric circuit, the comparator being connected to the emergency stop device to trigger an emergency stoppage of the cutting tool in case the threshold characteristic is exceeded. - an electrically conductive cutting member, - a motor for actuating the cutting member, electrically controlled, - a handle for gripping the cutting tool by the hand of a user, the gripping handle being electrically insulated from the cutting member, - a control for triggering cutting actuatable by the hand of the user gripping the gripping handle, the control for triggering cutting being electrically insulated from the cutting member, - an emergency stop device sensitive to a contact of a user with the cutting member, - characterised by: - at least one first and at least one second electrode for manual contact (32, 34), the first electrode for manual contact and the second electrode for manual contact being electrically insulated from one another and created on at least one out of the handle for gripping the tool and the control for triggering cutting, - a first electric circuit comprising the first electrode for manual contact, a first electric impedance and the cutting member, the first electric circuit being capable of being closed, during a simultaneous contact of the user with said first electrode for manual contact and the cutting member, - a second electric circuit comprising the first and the second electrode for manual contact (32, 34), the first electric impedance and a second electric impedance, the second electric circuit being capable of being closed during a simultaneous contact of the user with the first and the second electrode for manual contact (32, 34), - at least one device (56, 58) for measuring an impedance characteristic of the first electric circuit and an impedance characteristic of the second electric circuit, - a comparator of the impedance characteristic of the first electric circuit and of at least one threshold characteristic that is a function of the impedance characteristic of the second electric circuit, the comparator being connected to the emergency stop device to trigger an emergency stoppage of the cutting tool in case the threshold characteristic is exceeded. - at least one first and at least one second electrode for manual contact (32, 34), the first electrode for manual contact and the second electrode for manual contact being electrically insulated from one another and created on at least one out of the handle for gripping the tool and the control for triggering cutting, - a first electric circuit comprising the first electrode for manual contact, a first electric impedance and the cutting member, the first electric circuit being capable of being closed, during a simultaneous contact of the user with said first electrode for manual contact and the cutting member, - a second electric circuit comprising the first and the second electrode for manual contact (32, 34), the first electric impedance and a second electric impedance, the second electric circuit being capable of being closed during a simultaneous contact of the user with the first and the second electrode for manual contact (32, 34), - at least one device (56, 58) for measuring an impedance characteristic of the first electric circuit and an impedance characteristic of the second electric circuit, - a comparator of the impedance characteristic of the first electric circuit and of at least one threshold characteristic that is a function of the impedance characteristic of the second electric circuit, the comparator being connected to the emergency stop device to trigger an emergency stoppage of the cutting tool in case the threshold characteristic is exceeded.