The autor has ever researched on severe convective rainfalls in Kyushu with 3.2cm wave lengh Weather Rader during the last stageaof Baiu(summer rainy season). The present paper describes some charavteristic features of convective rainfalls with abundant Rader photographs and raindrop size distribution data. The results of analysis make the precioitation structure of severe convective rainfalls in Kyushu to be quite different from many sorts of models of severestorm in foreign conutries. Discussions were made mainy from points of view of cloud physics. Concluding remarks are summarized as follows and a model of severe convective rainfall in Kyushu is advanced....