electrode 4 a and the other end electrically connected to the detection wire 7 through a through hole 9 a formed in the protective layer 9 and extending from the upper surface of the protective layer 9 examples of the material constituting the third connecting electrode 7 a are the same as those of the first connecting electrodes 3 b and the second connecting electrodes 4 b examples of the method for forming the third connecting electrode 7 a are the same as those for the first connecting electrodes 3 b and the second connecting electrodes 4 b as shown in fig7 the protective layer 9 preferably has a curved inner edge 91 on the input region e 1 side when the inner edge 91 is curved the possibility of detachment of the third connecting electrode 7 a located on the inner edge 91 can be lowered moreover when the inner edge 91 is curved the stress acting on the protective layer 9 upon user 39 s input operation can be relaxed at the inner edge 91 as shown in fig2 3 and 7 the protective sheet 11 is disposed on the first main surface 2 a of the substrate 2 corresponding to the input region e 1 and the non input region e 2 with an adhesive layer 10 therebetween the protective sheet 11 protects the first main surface 2 a of the substrate 2 from being scratched by the user 39 s finger fl the protective sheet 11 is formed on the entire first main surface 2 a of the substrate 2 with the adhesive layer.