Objective: This study was designed to investigate the effect of Cued Speech (CS) on speech perception abilities of elementary school students with hearing impairment in Tehran. Method: In this experimental design study, with pretest, post-test and control group, participants were 16 students having profoundly hearing impairment ageing 9-12,  whom were selected from   Tehran special schools for hearing impaired students. Eight children were taught Cued Speech for five months in an everyday 45-60 minutes sessions program .They were matched with 8 hearing impaired children as the control group. Both control and experimental groups were presented with Auditory Perception test (APT-HI) as pretest, post-test and follow-up. Mixed Repeated Measurement was used to analyze the data. Results: CS substantially improved performance of the experimental group (p<0.05) but there was no significantly important difference between pre-test, post-test and following scores of the control group (p<0.05). Conclusion: This study supports the use of Persian CS for improving auditory perception abilities in the hearing-impaired children.