The invention relates to an electronic weigher. The electronic weigher comprises a driving roller, a driven roller and a belt, wherein the driving roller and the driven roller are mounted on a main beam through a bearing block; the belt coils the driving roller and the driven roller; the driving roller is connected with a speed reducer through a chain wheel; a weigher rack is mounted in the middle of the main beam; a cross beam which is arranged in parallel with the driven roller is fixed at the center right of the main beam; the cross beam is erected on a weighing sensor and is connected with the weigher rack. The electronic weigher has the characteristics of being simple in structure, and fast to weigh, and reducing manpower.