Eight species of the genus Promalactis are recognized from Laos. Among them, five species are described as new: P. unidentalis sp. nov., P. tenuiclavifera sp. nov., P. introflexa sp. nov., P. bolikhamsaiana sp. nov. and P. serrulata sp. nov.; three species are newly recorded for this country: P. carinata Du, Li et Wang, 2011, P. flavidia Kim, 2018 and P. apicuncata Wang, 2018. Images of adults and genitalia of all the new species are provided.
Keywords: Lepidoptera, Microlepidoptera, Gelechioidea, taxonomy, new record.