We address the current taxonomic status of two problematic Eastern Asian species of Oecobius Lucas 1846 and propose nomenclatural changes in view of the information currently available. Oecobius formosensis (Kishida 1943) is considered unrecognizable and proposed as a nomen dubium. Two synanthropic species, Oecobius navus Lucas 1859 and Oecobius concinnus Simon 1893, are newly recorded for Taiwan. Evidence from the literature indicating that a third species (Oecobius marathaus Tikader 1962) also occurs in that country is provided. Oecobius sapporense Saito 1934 is transferred to the genus Neriene Blackwall 1833 (Linyphiidae) based on its original description and illustrations.