Spreading machine for grids for obtaining electric storage batteries, which comprises: - a support structure provided with at least one slide channel being extended according to an extension direction along which it is susceptible to advance a strip of grids provided with a plurality of through holes; - at least one hopper arranged above said slide channel and provided with at least one lower opening, through which said hopper is adapted to distribute a paste of active material on said strip of grids; - support means mounted on said support structure, positioned at least partially below said hopper, and provided with a movable surface susceptible to receive said strip of grids in abutment at least at a support section of said slide channel arranged below the lower opening of said hopper; - at least one separation body, integral with said support structure, arranged in said slide channel upstream of said support section with respect to the advancement sense of said strip of grids, and provided with a guide surface on which a lower face of said strip of grids is susceptible to slide; said separation body being at least partially positioned above the movable surface of said support means, and being adapted to guide said strip of grids to slide spaced from said movable surface at a separation section of said slide channel arranged between said separation body and said support section, and being extended at least partially below the lower opening of said hopper; said spreading machine being characterized in that said separation body is provided with a cavity obtained on said guide surface, arranged below the lower opening of said hopper, and adapted to receive at its interior at least one part of said active material paste, which is distributed from said hopper on said strip of grids and which traverses the holes of said grids, falling below said strip of grids; said strip of grids being adapted to slide above said cavity, bringing its lower face in contact with a surface layer of said part of active material paste contained in said cavity, such surface layer adhering to said lower face, covering it. - a support structure provided with at least one slide channel being extended according to an extension direction along which it is susceptible to advance a strip of grids provided with a plurality of through holes; - at least one hopper arranged above said slide channel and provided with at least one lower opening, through which said hopper is adapted to distribute a paste of active material on said strip of grids; - support means mounted on said support structure, positioned at least partially below said hopper, and provided with a movable surface susceptible to receive said strip of grids in abutment at least at a support section of said slide channel arranged below the lower opening of said hopper; - at least one separation body, integral with said support structure, arranged in said slide channel upstream of said support section with respect to the advancement sense of said strip of grids, and provided with a guide surface on which a lower face of said strip of grids is susceptible to slide; said separation body being at least partially positioned above the movable surface of said support means, and being adapted to guide said strip of grids to slide spaced from said movable surface at a separation section of said slide channel arranged between said separation body and said support section, and being extended at least partially below the lower opening of said hopper;