Lepidopteran hitchhikers were investigated in vessel at five major ports of Korea in 2013. These moths were collected by International Plant-Quarantine Accreditation Board (IPAB) during inspection on vessels for Asian Gypsy Moth (AGM). The results typically include the taxonomic identification, their origin localities, and information related to commodities and ship’s route. A total of 1,026 individuals were detected in vessels and identified with 236 species belonging to 21 families. Although most of the species are already known to the Korean fauna, the following three species are unknown: Lymantria xylina Swinhoe (Lymantriidae), Glyphodes actorionalis Walker (Crambidae), and Histia flabellicornis nigrinus Jordan (Zygaenidae). Interestingly, H. flabellicornis nigrinus Jordan was detected for two consecutive years. Although this species is not an important pest, it will be need to necessarily continual monitoring. L. xylina Swinhoe which is a great potential forest pest, was detected four times (16 specimens) at Busan port of entry. Therefore, it is necessary to provide comprehensive border surveillance monitoring and a valuable historical record of the array of lepidopteran hitchhikers transported to the Korea through inanimate pathway, in order to counter further potential importance of hitchhikers on international vessels at Korea.