A safety system for a working machine whereby an operator is able to interact with said machine, and wherein the system comprises: • a transceiver unit worn by said operator and configured to transmit a presence signal (Tx) representing the presence of said operator in proximity to said machine, wherein said presence signal (Tx) is continuous; • a central processing unit, associated with said working machine, configured to receive said presence signal (Tx) wherein said transceiver unit is configured to operate using radio frequency; • at least one conductive glove, designed to be worn by said operator in conditions of interaction of said operator with said machine, comprising electrical conduction means (85, 84) configured to operate in: ∘ a first operative condition representing an ordinary functioning of said machine, wherein said operator is electrically isolated from said machine; ∘ a second operative condition representing an alarm state of said machine, wherein said operator is in a condition of electrical conduction with said machine; • electrical connection means configured to connect said transceiver unit to said at least one conductive glove; wherein said central processing unit comprises: • a reception module configured to receive said presence signal (Tx); • a memory module configured to contain a predefined structure of presence signals (Txi_0) representing different operators authorized to operate said machine; • a recognition module configured to compare the current presence signal (Tx) with said predefined structure of presence signals (Txi_0) comprised in said memory module; • an authorization module configured to enable use of the machine by said operator if the current presence signal (Tx) is compatible with the predefined structure of signals Txi_0 comprised in said memory module; • a first alarm module configured to transmit an alarm signal to said safety system so as to disable said machine if said second operative condition occurs for said operator authorized by said authorization module. • a transceiver unit worn by said operator and configured to transmit a presence signal (Tx) representing the presence of said operator in proximity to said machine, wherein said presence signal (Tx) is continuous; • a central processing unit, associated with said working machine, configured to receive said presence signal (Tx) wherein said transceiver unit is configured to operate using radio frequency; • at least one conductive glove, designed to be worn by said operator in conditions of interaction of said operator with said machine, comprising electrical conduction means (85, 84) configured to operate in: ∘ a first operative condition representing an ordinary functioning of said machine, wherein said operator is electrically isolated from said machine; ∘ a second operative condition representing an alarm state of said machine, wherein said operator is in a condition of electrical conduction with said machine; ∘ a first operative condition representing an ordinary functioning of said machine, wherein said operator is electrically isolated from said machine; ∘ a second operative condition representing an alarm state of said machine, wherein said operator is in a condition of electrical conduction with said machine; • electrical connection means configured to connect said transceiver unit to said at least one conductive glove; • a reception module configured to receive said presence signal (Tx); • a memory module configured to contain a predefined structure of presence signals (Txi_0) representing different operators authorized to operate said machine; • a recognition module configured to compare the current presence signal (Tx) with said predefined structure of presence signals (Txi_0) comprised in said memory module; • an authorization module configured to enable use of the machine by said operator if the current presence signal (Tx) is compatible with the predefined structure of signals Txi_0 comprised in said memory module; • a first alarm module configured to transmit an alarm signal to said safety system so as to disable said machine if said second operative condition occurs for said operator authorized by said authorization module.