Four epigean Neobisium species have been recently collected from soil and litter in north-western parts of Iran. Neobisium (N.) crassifemoratum and Neobisium (N.) anatolicum, which are recorded for the first time from Iran, are redescribed and illustrated, providing some morphometric and morphological variations within the species. Also, the male genital organ of N. (N.) alticola is illustrated for the first time and a new locality record is given for N. (N.) validum.