21a the second layer 22 has five wide conductive strips 22b 1 which supply current to the printing head 31 and four narrow conductive strips 22b 2 which transmit other signals on the sheet like substrate 22a furthermore the conductive strips 22b 1 and the conductive strips 22b 2 are located at opposite sides of the sheet like substrate 22a in both the first layer 21 and the second layer 22 the wide conductive strips 21b 1 and 22b 1 are located on the left most portion of the first substrate 21 and the second substrate 22 in addition the narrow conductive strips 21b 4 and 22b 2 are located on the right most portion of the first substrate 21 and the second substrate 22 in other words the wide conductive strips which create noise are arranged on the left most portion of the substrates and the narrow conductive strips which are affected by the noise are arranged on the right most portion of the substrates as a result the problem of noise interfering with the transmitted signals are eliminated without a separate expensive shielding member fig4 shows another example of a fpc 20 39 of the present invention which is constructed of a single layer the fpc 20 39 comprises a sheet like substrate 20a 39 on which conductive strips.