An annular fan case (FC) for covering the outer periphery of the fan of an aircraft engine comprises: a case section (21) which contains a first composite material containing fibers and a resin; and a restraining section (22) which contains a second composite material containing fibers and a resin and which is formed on the outer periphery of the case section (21). The resin content of the restraining section (22) is set to be lower than the resin content of the case section (21).
