The present study is based on specimens collected in coffee orchards Coffea arabica L. using Malaise traps on three mountains in Southwestern of Saudi Arabia: Sala Mountain (Al-Aridah), Samad Mountain (Al-Aidabi), and Talan Mountain (Al-Dayer). Thirteen species are identified belonging to nine subfamilies: Agathidinae (two species: Coccygidium luteum (Brullé), and C. melleum (Roman)), Alysiinae (single species: Aphaereta sp.), Brachistinae (two species: Triaspis flavipalpis (Wesmael), and Triaspis thoracica (Curtis)), Cardiochilinae (two species: Schoenlandella subvariegata Edmardash & Gadallah sp. nov., and S. testacea (Kriechbaumer)), Cheloninae (single species: Phanerotoma granulata van Achterberg), Doryctinae (single species: Spathius nixoni Belokobylskij & Maetô), Euphorinae (single species: Syntretus (Exosyntretus) sp.), Pambolinae (single species: Phaenodus pallipes Foerster), and Telengaiinae (two species: Gnamptodon adami Gadallah & Edmardash sp. nov. and G. samadensis Gadallah & Edmardash sp. nov.). The three following subfamilies are recorded for the first time for the Arabian Peninsula: Brachistinae, Cardiochilinae and Pambolinae. The presence of the subgenus Syntretus (Exosyntretus) in traps from Jazan (Saudi Arabia) constitutes the second record of this taxon in the Afrotropical region. Furthermore, the subfamily Alysiinae, the genus Spathius Nees, 1819 (Doryctinae), and two species: Coccygidium melleum (Roman, 1910) (Agathidinae), and Phanerotoma granulata van Achterberg, 2021 (Cheloninae) are first records for Saudi Arabia.