Carbonization is one of the means to effectively utilize woody biomass. We are focusing on co-processing of woody biomass and waste plastics. We are expecting to adsorb heavy hydrocarbons derived from waste plastics by carbonized woody biomass and efficiently recover valuable gaseous and liquid products. In this study, PP (polypropylene) and RPF (Refuse derived paper and plastics densified fuel) were pyrolyzed at 500°C, and the adsorption behavior of pyrolysates to carbonized cedar pellets was investigated. The char successfully adsorbed larger molecule-size plastic-derived pyrolysates. Various pyrolysates are generated from RPF, and their adsorption behavior was different from PP.