This study approaches Percy B. Shelley’s poetry from the perspective of ‘eating’ to clarify the eco-centric consciousness in his poems. The organic process of eating is tied with, what M. M．Bakhtin (1895?1975) called, ‘dialogic imagination’. As both require ‘interaction between subject and object’ and have ‘dialectic developments’, the linking of eating and dialogic imagination is quite suitable for explaining the intrinsic relation between the inside and the outside, one and the other, and human beings and nature. The eating in this study has gradual steps following every natural dietary process: 1) A Prescription for Natural Diet, 2) Indigestion as the Absence of Communication, 3) Digestion as Communication with Nature, and, in conclusion, 4) The Production of Biocentrism. Shelley’s early production, Alastor, or The Spirit of Solitude, acts as ‘A Prescription for Natural Diet’ by showing what prevents a natural diet. The poem shows a young poet who wants to satisfy his mental hunger for his soul not the physical one for his body. Prometheus Unbound shows ‘Indigestion as the Absence of Communication.’ The indigestion comes mainly from the lack of consideration of ‘the eater’ for ‘the eaten’ clearly seen from the eagle who violently devours the liver of Prometheus. Queen Mab cl...