The cabbage aphid, Brevicoryne brassicae was recorded as a serious pest of canola plant. The morphology and ultrastructure of the antennal sensilla of both alate and apterous forms of adult, B. brassicae were observed. This study also focus on the ultrastructure of the sensilla on the different parts of cabbage aphid. These were examined via scanning electron microscopy (SEM) in order to highlight the importance of these sense organs as a source of morphological characters for taxonomy, phylogeny and to understand the mechanism in which aphid could resist the control methods.