Morphological causatives in Korean show some intimate correlations with morphological passives across different domains of the grammar. Morphologically, both the causative and the passive can be marked with the allomorphs -i, -hi, -li, -ki; syntactically, in both constructions, the agent of the stem verb can be assigned dative case -eykey; and semantically, some apparent causative constructions (often called the retained object construction) may be interpreted passively. In this paper, I suggest that the causative-passive correlations arise because the causative may contain the passive as part of its structure. Specifically, I argue that (i) the passive in Korean involves passive Voice; and that (ii) the head responsible for causativization, Caus(e), c-selects VoiceP in Korean including passive VoiceP. The possibility of Caus taking passive VoiceP as its complement is claimed to bring about the correlations in question.