A joint structure includes a first substrate in which a resin portion which protrudes from one face and is formed of a resin, and a first electrode which covers a part of the resin portion are formed, and a second substrate on which a second electrode corresponding to the first electrode is formed are joined in a state in which the first electrode and the second electrode are electrically connected, in which a region in which the resin portion is disposed on one face of the first substrate includes a first region in which the resin portion is in contact with the one face, and a second region in which the resin portion is separated from the one face, and the second region is formed in the outside of the first region in the inside of the one face.