A touch input device includes: a touch surface that has a three-dimensional structure, and identifies a touch coordinate of a point touched by an object; and a controller that defines a first direction in the touch surface as a first direction in an output coordinate, and outputs information about the output coordinate, wherein the three-dimensional structure has a size and a height at least one of which is changed so that the first direction in the touch surface and a second direction in the touch surface intersecting with the first direction in the touch surface can be recognized.