The present study was conducted to investigate the effect of subclinical infection with Haemonchus contortus on meat composition of Karadi lambs. A total of 14 lambs were used in this study; seven lambs were infected with (500) infective larvae of Haemonchus contortus larvae kg^-1 body weight, the remained lambs were left as uninfected control group.  This study continued until 13^th week post-infection. Statistically analyzed by SPSS program using T-test the results indicated that there was differences in protein percentage in leg, ribs (9, 10, 11) and fore shank between the two groups (infected and control). These differences were statistically not significant. There was  significant difference (p < 0.01) of fat percentage in ribs (9, 10, 11) area between the two groups, while there was slight difference in fat percentage in leg and fore shank areas but statistically not significant. The moisture percentage in leg, ribs (9, 10, 11) and fore shank areas of infected group was higher than the control group but this difference was statistically not significant. Ash percentage in leg, ribs (9, 10, 11) and fore shank areas was convergent of both groups. In this study it can be concluded that there was a slight effect of subclinical infection with H. contortus on chemical composition of Karabi lambs carcasses.