This research studies Indonesian verbal affixation from derivational and inflectional morphological perspectives. It is a qualitative research project applying structural linguistic method. This research also uses case grammar for semantic analysis. The results indicate that Indonesian verbal affixation has six inflectional affixes which include 1) meN- 2) di- 3) ku-(clitic) 4) kau- (clitic) 5) beR- and 6) zero.