The invention provides a touch panel and a method for forming wiring area, in order to reduce the possibility of failure generated in a conductive area as tolerance margin, and prevent degradation ofelectric features. The touch panel includes: a sensor part; and a wiring area including a wiring for connecting the sensor part and a connector part, in which a first and a second trimming lines are provided over a conductive area located inside and/or outside of several wirings in the wiring area, a first section including a wiring with a first width and a second section including a wiring with asecond width crossing the conductive area in the width direction and wider than the first width are formed by the first trimming line, and the second trimming line crosses the first trimming line inthe second section so that the width of the wiring in the second section is narrower than the second width.