1. In order to investigate the root system and the root physiology of rice plants, plastic pots of acrylic acid compound were fashioned experimentally. 2. These pots were convenient for observing the root system and the oxidizing or reducing condition of paddy soil. 3. These pots are durable and convenient for research on plant roots. Although at present the pots are quite expensive, they will undoubtedly be useful for many agronomical experiments.