The family Crabronidae (Hymenoptera) was studied in parts of southern Iran. Fourty three species and subspecies belonging to 19 genera representing five subfamilies: Astatinae, Bembicinae, Crabroninae, Pemphredoninae and Philanthinae were collected and identified. Nine species: Larra rufa Arnold, Liris subfasciatus (Walker), Parapiagetia erythropoda (Cameron), P. genicularis (F. Morawitz), T. gujaraticus Nurse, T. lucillus Pulawski, T. nitidissimus de Beaumont, T. plicosus (A. Costa) and Trypoxylon splendidum Antropov are new records for Iranian insect fauna. In addition, available information as well as comments on taxonomy and geographical distribution for each species are included.