In order to investigate the possibility of utilizing cermet piece as a seed corm in taro, the cermet piece classified by the weight were planted on April 30, 2000. The effect of weight of cermets cutting by two pieces (5, 10, 15, and 20g) and four pieces (15g) on the growth, yield, and quality of taro was comparing with cormel follows as: The larger the size of cormel pieces was, the more number of leaves developed, and the higher the yield was. Also the growth of small cormel pieces was normal, so we forecast that it is possible to use small cermet pieces as seed cermet in mass production of taro.