COMPOSITE MATERIAL STRUCTURE

To reduce the generation of a potential difference around a joint part even when a thunder current flows due to a lightning strike or the like, and improve thunder resistance of the joint part with a simple structure.SOLUTION: A composite material structure comprises: a first composite material in which a first resin is impregnated into a first reinforcing fiber with conductivity; a second composite material in which a second resin is impregnated into a second reinforcing fiber with conductivity; an adhesive layer arranged between the first composite material and the second composite material, and adhering the first composite material and the second composite material; and an electromagnetic shield material coating at least a part of an exposed portion exposed to the outside of the adhesive layer. A thunder current direction in which a thunder current generated by a lightning strike flows is previously regulated at least for one of the first composite material and the second composite material, and the electromagnetic shield material is provided inside a surface of a lateral face to be an end face in a direction orthogonal to the thunder current direction.SELECTED DRAWING: Figure 2 【課題】落雷等によって雷電流が流れる場合であっても、接合部の周囲における電位差の発生を低減し、接合部の耐雷性の向上を簡易な構成で図る。【解決手段】導電性を有する第１強化繊維に第１樹脂が含浸された第１複合材料と、導電性を有する第２強化繊維に第２樹脂が含浸された第２複合材料と、前記第１複合材料と前記第２複合材料との間に配置されて前記第１複合材料と前記第２複合材料とを接着する接着層と、前記接着層の外部に露出する露出部位の少なくとも一部を被覆する電磁遮蔽材と、を備え、前記第１複合材料及び前記第２複合材料の少なくとも一方には、落雷により発生する雷電流が流れる雷電流方向が予め規定され、前記電磁遮蔽材は、前記雷電流方向に直交する方向の端面となる側面の面内に亘って設けられる。【選択図】図２