The Swedish species of Leiophron nees are reviewed. The species Leiophron reclinator (Ruthe, 1856), L. fulvipes (Curtis, 1833) and L. duploclaviventris (Shenefelt, 1969) are reported for the rst time from Sweden. Leiophron similis (Curtis, 1833) is introduced as a new synonym of L. basalis (Curtis, 1833). a key and diagnoses for the identifcation of the Swedish species are also provided. There are currently nine species known in Sweden, most parasitize on Miridae (hemiptera) and Psochidae (Psocoptera).