Intra-hill variances and coefficients of variance of culm and panicle length were increased while the avrage culm and panicle lenghts were decreased in the plot of the more planting numbers of seedlings per hill in paddy rice. The cumulative frequency of shorter culm than average lenght showed great differences between different planting numbers of seedling per hill. Verietal response of intra-hill culm and panicle length variation to different planting numbers of seedling per hill was not same and non-application of nitrogen fartilizer induced length under the more planting numbers of seedlings per hill.