An aircraft assembly having improved durability and capable of providing good lightning protection is provided. Provided is an aircraft assembly (1) equipped with an outer panel (5) that is constructed using an outer-panel resin material reinforced with fiber as a main element; a structural member (7) that supports the outer panel (5) from the inside; and a fastener (3) that joins the outer panel (5) and the structural member (7), the aircraft assembly including an insulator layer (23) having insulating properties and disposed so as to cover at least the head (17) of the fastener (3); and a conductor layer (25) disposed so as to cover at least the insulator layer (23) and formed of a conductor-layer resin material containing copper powder having electrical conductivity.