This atlas gives a comprehensive overview of the distribution, taxonomy and ecological patterns of Early Miocene to Recent smaller benthic foraminifera from eastern Indonesia. It is meant to serve paleontologists in helping to improve the biostratigraphical framework and paleoecological distribution patterns of eastern Indonesia and adjacent Indo-Pacific regions. Compared to other areas, published information on Late Cenozoic smaller benthic forminifera from Indonesia and adjacent areas is limited. In Indonesia, many geological, including micropaleontological, investigations have actually been carried out by various oil companies and consultants, but the results of those studies have always been confidential and unpublished.