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Tachyporinae are one of the most phylogenetically problematic subfamilies in the mega-diverse rove beetle family Staphylinidae. Despite its high diversity and abundance in forest micro-environments, with over 1600 species worldwide, several previous studies had refuted the monophyly of this subfamily and its largest tribe, Tachyporini. Based on the results of morphology-based phylogenetic analyses and direct examination of specimens encompassing two extinct and all forty extant genera, a new suprageneric classification of Tachyporinae is proposed here, with the removal of the tribe Mycetoporini into a newly recognized subfamily Mycetoporinae stat. nov. Four tribes with two subtribes are arranged within Tachyporinae sensu nov.: Tachyporini sensu nov. (Tachyporina stat. nov., sensu nov. and Euconosomatina stat. rev., sensu nov.), Vatesini sensu nov., Deropini, and Tachinusini stat. rev., sensu nov. (= Megarthropsini syn. nov.). <em>Urolitus</em> syn. nov. is placed as a junior synonym of <em>Sepedophilus</em>. Additionally, <em>Palporus</em> stat. nov. is raised to a distinct genus from a subgenus of <em>Tachyporus</em> sensu. nov., and †<em>Mesotachyporus</em> syn. nov. is synonymized with the latter. Mycetoporine <i>Bobitobus</i> stat. rev. is resurrected from synonymy with <i>Lordithon</i> sensu nov., and considered as a valid genus. My revised classification provides a novel framework for taxonomic inventories and ecological studies of these groups.