A mobile operating machine comprising a motor vehicle provided with at least one internal combustion motor which cooperates with a movement unit to move said motor vehicle, an articulated arm able to deliver concrete and a pumping unit configured to pump the concrete from said drum to said articulated arm. At least one of either the articulated arm or the pumping unit is connected to a respective hydraulic pump configured to pump a working fluid and determine the drive of said articulated arm and/or respectively said pumping unit. The mobile operating machine also comprises at least one electromechanical machine connected to said internal combustion motor, to said hydraulic pump, and to an electric accumulator.