A load cell for metallic silos, comprising: - a bottom base plate for supporting it on a ground surface; - a top plate for receiving and supporting a portion of a metallic silo to be weighed; - a flexible element comprising at least one extensometer; - a spacer interposed between said bottom plate and said flexible element, wherein said load cell comprises a monobloc structure, comprising said bottom plate, said top plate and said flexible element, and wherein said monobloc structure comprises ground fastening means comprising four holes (15a, 15b, 15c, 15d), arranged in proximity of the four corners of said monobloc structure, and four corresponding screws (16a, 16b, 16c, 16d), adapted to co-act stably with four corresponding threaded bushings provided in holes produced in said ground surface, characterized in that said monobloc structure is substantially parallelepiped in shape, having two longer sides (41, 42) and two shorter sides (43, 44), and two (15a, 15b) of said four holes extend to intercept a same side of said monobloc structure, so that the load cell is easily removable from below the silos by removing only two of these screws, also for replacement or maintenance. - a bottom base plate for supporting it on a ground surface; - a top plate for receiving and supporting a portion of a metallic silo to be weighed; - a flexible element comprising at least one extensometer; - a spacer interposed between said bottom plate and said flexible element, wherein said load cell comprises a monobloc structure, comprising said bottom plate, said top plate and said flexible element, and wherein said monobloc structure comprises ground fastening means comprising four holes (15a, 15b, 15c, 15d), arranged in proximity of the four corners of said monobloc structure, and four corresponding screws (16a, 16b, 16c, 16d), adapted to co-act stably with four corresponding threaded bushings provided in holes produced in said ground surface, characterized in that said monobloc structure is substantially parallelepiped in shape, having two longer sides (41, 42) and two shorter sides (43, 44), and two (15a, 15b) of said four holes extend to intercept a same side of said monobloc structure, so that the load cell is easily removable from below the silos by removing only two of these screws, also for replacement or maintenance. wherein said load cell comprises a monobloc structure, comprising said bottom plate, said top plate and said flexible element, and wherein said monobloc structure comprises ground fastening means comprising four holes (15a, 15b, 15c, 15d), arranged in proximity of the four corners of said monobloc structure, and four corresponding screws (16a, 16b, 16c, 16d), adapted to co-act stably with four corresponding threaded bushings provided in holes produced in said ground surface, characterized in that said monobloc structure is substantially parallelepiped in shape, having two longer sides (41, 42) and two shorter sides (43, 44), and two (15a, 15b) of said four holes extend to intercept a same side of said monobloc structure, so that the load cell is easily removable from below the silos by removing only two of these screws, also for replacement or maintenance.