The present work was carried out to study the sero-prevalence of Haemonchus contortus infection in sheep by Indirect-Enzyme Linked Immuno Sorbent Assay (Indirect-ELISA) using somatic antigen. Out of 100 abomasums screened, 57 found positive for H. contortus adult worms. A total of 250 serum samples which includes, 100 serum samples from local abattoir in and around shimoga region from the animals from which the abomasums were collected and 150 serum samples from migratory sheep were used to detect the circulating antibody against H. contortus by Indirect-ELISA using somatic antigen. Of the 57 sheep harboring adult worms in their abomasums, the serum samples showed positive reaction by Indirect-ELISA with somatic antigen. However, among 43 sheep which are not showing any adult worms of H. contortus in their abomasums, but their 21 serum samples showed positive reaction by Indirect-ELISA. The sensitivity and specificity of Indirect-ELISA was found to be 100 and 67.18 %, respectively. Also, the sero-prevalence of H. contortus infection was found to be 58.66 % out of 150 migratory sheep serum samples screened for detecting circulating antibodies of H. contortus by Indirect-ELISA using somatic antigen in and around shimoga region.