Objective： To obtain the complete β-actin gene from Aedes albopictus. Methods： Total RNA was extracted from C6/36 cells. Degenerate primers were designed based on the β-actin sequences of An. gambiae， Ae. aegypti， Cx. pipiens pallens and D. melanogaster. By RT-PCR， the product was amplified， purified， cloned into the pGT vector and sequenced. The β-actin sequence was aligned and phylogenetically analyzed by the BLAST program and the CLUSTAL W program. Results： A sequence of 1132 bp including an open reading frame of 1131 bp was obtained（GenBank DQ657949）. The deduced protein had 376 amino acids. Aligned to SWISS-PROT， it exhibited a high level of identity with β-actins from Anopheles， Drosophila and Culex at the amino acid sequence level. Phylogenetic analysis indicated that Ae. albopictus β-actin was much more homologous with invertebrate β-actin than with vertebrate β-actin. Conclusion： The gene may be used as the internal control in the experiments of Ae. albopictus.