This study was carried out investigate the storability of onions on calcium spraying, after cutting foliage, 6 different treatemnt , the dilution spraying of calcium nitrate 9 3%, 6%) , calcium carbonate(3%, 6%), dust scattering and the controls were evaluated for rotting, sprouting, healthy bulb and total weight loss ratio during storage. Rotting ratio on the dilution spraying of 6% calcium carbonate was lower than that of the control after 4 months storage by 16.7%. Sprouting and total weight loss were decreased in the dilution spraying of 6% calcium carbonate.