The input detection device includes: a line having an end to which a driving signal is supplied and extending in a first direction; a plurality of drive electrodes extending in a second direction intersecting the first direction and arranged in parallel in the first direction; a selecting drive circuit selecting the drive electrode from the plurality of drive electrodes and connecting an end of the selected drive electrode to the line; a driving signal circuit supplying the driving signal to the end of the line; and a plurality of line patterns connected to each drive electrode. A line density of line patterns connected to a drive electrode connected to be close to the end of the line is smaller than a line density of line patterns connected to another drive electrode connected to be far from the end of the line.