Table 1 shows measurement results on attenuation per unit length in transmission of 0.625 GHz, 1.25 GHz, and 6 GHz signals, in each of the high frequency signal transmission cable 1 (Example) according to the present embodiment, and a comparative example using a normal stranded wire conductor in place of the inner conductor 2 made of the compressed stranded wire conductor of the Example, and a metal tape helically wrapped in place of the plating layer 4 and the crack suppressing layer 7 of the Example.