In our study, the presence and expression of P27 gene in L.tropica evaluated in promastigotes by PCR and RT-PCR using specific primer pairs that manually designed after determine the consensus sequence of forward and reverse region of primers between species of Leishmania by using MUSCLE (Multiple Sequence Comparison by Log- Expectation) tool for alignment. The results proved the presence of P27 gene in Leishmania tropica, beside presence the mRNA of P27 gene that confirm that P27 expressed in promastigote form of L.tropica