The decomposition of carbon fiber reinforced plastics (CFRP) was carried out to recover phenolic monomers and carbon fiber (CF) using subcritical water. The total yield of phenolic monomers reached 70.9% at 673K, 20MPa, 45min and 2.5wt% potassium carbonate catalyst. The tensile strength of the recovered CF was about 15% lower than that of a virgin one and it might be acceptable level for industrial use such as filler in polymers. The functional groups on the surface of the recovered CF decreased, comparing with a virgin one. Therefore the oxidation treatment of the recovered CF might be required, when we try to reuse it.