Three kidney bean cultivars were used to investigate the variability of amino acid content with different levels of phosphorus utilization. The results indicted that amino acid content in kidney bean cultivars increased when P level increased and the components of indispensable amino acid differed among kidney bean cultivars. The highest content of amino acid and its components were observed at 50kg/hm^2 P level in Pinyun 2 and NR cultivars while the highest content in Pinyun 1 was detected at 25kg/hm^2 level.