Abstract: A pot experiment was conducted to investigate calcium (Ca) content in brown rices of 89 rice cultivars of 5 genotypes. Results show that the tested rice cultivars differed sharply between genotypes and vary from 44.5~245.5mg/kgin Ca accumulation. In terms of Ca content in brown rice, the 5 genotypes of rice are in the order of conventional late Japonica rice>hybrid late Indianica rice>conventional late Indianica rice>conventional early Indianica rice>conventional medium Japonica rice.