Abstract: This study was conducted to identify the effect of using cumin (Cuminum cyminum) on the performance and some blood traits of broilers. Two hundred one day-old unsexed broiler chicks (Arbor-Acres) were divided into four groups of 50 birds each and assigned to four feeding treatments. Group 1 is considered as a control group where there was no addition of Cuminum cyminum. Group 2, 3 and 4 involved the addition of 0.5, 1 and 1.5% of Cuminum cyminum respectively. The results showed that group 2 and group 3 performed significantly higher (p<0.05) in the average live weight, weekly weight gain, feed consumption, mortality rate and feed conversion ratio. Results showed that chicks in treatment 3 developed a significant decrease in the level of cholesterol in blood serum compared to other treatments.