A highly reliable electrostatic-capacitive-type
display device with a
touch panel which allows a user to perform
finger touch inputting and exhibits excellent detection sensitivity is provided. A transparent conductive film is formed above a back surface of an electrostatic-capacitive-type
touch panel so as to block noises generated by a
display device. A conductive member is provided to supply a
voltage to a transparent conductive film formed above a back surface of the
touch panel. An
electrode which is formed on the electrostatic-capacitive-type touch panel is divided in accordance with a ratio between the number of X electrodes and the number of Y electrodes. A
floating electrode is formed in a gap defined between the electrodes so as to adjust an area of the
electrode. Due to the shrinkage of the area of the
electrode, it is possible to lower a
noise level to a level equal to or lower than a
signal level. Accordingly, an S / N ratio is increased thus enhancing detection sensitivity. Further, lines are branched on a flexible
printed circuit board and intersecting lines are formed on a back surface of the flexible
printed circuit board, and the intersecting lines are made to orthogonally intersect with lines formed on a front surface of the flexible
printed circuit board thus lowering line
capacitance.