Metaphor has long been used as an effective stylistic device to convey implicatures in both poems and songs. In recent years, with the strong development of cognitive linguistics, conceptual metaphor has taken a dominant role in the perception of artistic and poetical works. Up to now there have been many studies on conceptual metaphors of love, life, death, time, human fate, etc; however, there is hardly a contrastive study of the conceptual metaphor related to the image of the sea in English songs versus Vietnamese ones. Therefore, this paper is to help Vietnamese learners of English and English learners of Vietnamese be more aware of the conceptual metaphor used in English and Vietnamese songs to apply this to translation in general and song translation in particular.