There is provided a joint structure (1) for a fiber reinforced resin (3) and a metal (2). In the joint structure, respective end portions of a fiber reinforced plastic and a metallic material are joined to each other. A large number of projections (22) having a height that enables the projections to contact fibers constituting the fiber reinforced plastic are formed on a joint surface of the metallic material serving as a part of a joint surface between the fiber reinforced plastic and the metallic material.