We describe the development of novel lentivirus vectors based on simian immunodeficiency virus from African green monkey (SIVagm) pseudotyped with Sendai virus (SeV) envelope glycoproteins. SeV fusion (F) and hemagglutinin-neuraminidase (HN) proteins were successfully incorporated into the SIVagm-based vector by truncation of the cytoplasmic tail of the F protein and by addition of the cytoplasmic tail of SIVagm transmembrane envelope protein to the N terminus of the HN protein. As with the vesicular stomatitis virus G glycoprotein-pseudotyped vector, the mutant SeV F- and HN-pseudotyped SIVagm vector was able to transduce various types of animal and human cell lines. Furthermore, the vector was able to transduce an enhanced green fluorescent protein reporter gene into polarized epithelial cells of rat trachea from the apical and basolateral sides. Therefore, SeV F- and HN-pseudotyped SIVagm vectors have considerable potential for effective use in gene therapy for various therapies, including respiratory diseases.