This study was performed to assess Protaetia brevitarsis larva excrement as an organic fertilizer for corn cultivation. Furthermore, the study investigated insect communities in each treatment. In 2009, the corn growth rate was worst in soil treated with P. brevitarsis larva excrement and in 2010, the corn growth rate was worst in untreated soil. From the outcome of the study, P. brevitarsis larva excrement could be utilized as organic fertilizer for corn cultivation.