Background: Immunological infertility is expected to be the reason of infer-tility in 9-36% of the concerned twosomes. The major cause of immunological infertility is the creation of anti-sperm antibodies (ASA), which influence the capability of insemination of spermatozoa. It has been detected that anti-sperm antibodies (ASA) are present either systemically in blood or locally in seminal plasma of approximately 10% of infertile male patients. Immunity to sperm can cause infertility; humoral antibodies directed against sperm did not necessarily impair fertility unless the circulating antibodies are also present within the re-productive tract and on the living sperm surface. Hormonal imbalance and sperm autoimmunity have been considered as two systems that play in near association and affect each other. Testosterone is the Steroid hormone necessary for the de-velopment and maintenance of secondary sexual characteristics as well as initi-ation and maintenance of Spermatogenesis .It was known that males with abnor-mal seminal fluids have lower concentrations of the testosterone hormone. Objectives: To study the serum & seminal plasma antisperm antibodies levels in relevance to levels of testosterone in serum and seminal plasma accordingly to sperm function parameters in different groups of infertile patients. Subjects,Materials and Methods: Blood and semen samples were collected from (80) subjects (60) infertile patients (20Asthenozoospermic, 20 Oligozoospermic,20Azoospermic) and 20 Normozoospermic subjects .The anti-sperm antibody and testosterone levels were measured by using Enzyme Linked Immunosorbent Assay (ELISA). Results: The Antisperm antibodies were positive in serum of normozoospermic, asthenozo-ospermic, oligozoospermic and azoospermic men respectively are about 10%, 5%, 20%,5% and in the total group was 10% positive. The ASA in seminal plasma of normozoospermic men, asthenozoospermic men, oligozoospermic men and azoospermic men respectively are 0%, 0%, 5%, 5% and in the total groups 2.5%.These findings lead to no possibility to make clear correlations with the studied hormones. There was significant increase (P<0.05) in the levels of testosterone in serum and seminal plasma in comparison between normozoospermic and infertile men subgroups. There was significant decrease (P<0.05) in the levels of pro-gesterone in serum and seminal plasma in comparison between normozoospermic men and infertile men subgroups, the highest levels were observed in asthenozoospermic subgroup. The study showed that 10 patients (12.5%) out of 80 patients showed a positive ASA positive in serum or seminal plasma of all groups. The result was considered positive if the value was ≥60 RU / ml .On these basis and regarding that screening criteria the positive ASA group showed the association with the low levels of testosterone in both types of the samples(serum and seminal plasma), these results was exhibited a high significant difference when compared with negative ASA group. Conclusion: Determination of the relevance of the levels of testosterone and anti-sperm anti-bodies in the serum and seminal plasma, which in turn is important to determine the type of infertility especially the immunological type.