Maltoporin (LamB) is a family of outer membrane proteins.There has been no report of immunological characteristics of Lamb in Vibrio species so far.In this study, lamB genes from eight Vibrio strains were cloned and sequenced.The bioinformatics analysis indicated that sequence similarities of Lamb proteins were ranged from 46.7% to 81.1%.Further, the result showed that their antigenic epitopes were highly conserved implying that LamB might be a shared antigen among Vibrios.