Sustainable reduction in semen quality due to detrimental effects of primary and secondary peroxidative products was occurred during liquid storage. The objective of the current experiment was to explore the influence of bovine serum albumin conjugated linoleic acid (LA) on the rooster spermatozoa routine tests and lipid peroxidative/antioxidative levels stored at 4°C over 48h. For this purpose, collected ejaculates (≥ 80% progressive motile spermatozoa) pooled and extended with the phosphate buffer medium without (control) or enriched with different amounts of LA (0.125, 0.25 or 0.50mM). Contents of total antioxidant status (TAS) and thiobarbituric reactive substances (TBARS) were measured separately in the medium and spermatozoa, as well as percent of viability and motility at 0, 24 and 48h intervals. Viability was not affected by treatment during the study intervals (P > 0.05). While, higher motility was recorded in LA 0.50mM group (77.98 ± 1.89 and 57.02 ± 2.45) compared to the control group (68.78 ± 1.29 and 45.09 ± 1.86) at 24 and 48h, respectively (P < 0.03). Amounts of TBARS in medium and spermatozoa were lower in LA 0.25 and 0.50 groups compared to the control at 48h (P < 0.01). Moreover, TAS levels of medium and spermatozoa were lower in control samples compared to LA treated groups at 48h (P < 0.03). Because of the ability of the LA to lowering the quantities of lipid peroxidation index and improving motility especially at 0.5mM levels, it can be proposed as an additive during liquid storage of rooster semen.