Probe card

A probe card comprising:

• a plurality of probe pins that are elastic and that have first end portions that electrically contact electrodes of a fine circuit board to be measured, and second end portions that electrically contact electrodes of a wiring board for signal input/output;
• an insulator that has a plurality of through-holes through which the probe pins pass respectively;
• and
• a first substrate and a second substrate that are respectively positioned at both sides of the insulator, the first substrate having supporting holes into which the first end portions of the probe pins are inserted, and the second substrate having supporting holes into which the second end portions of the probe pins are inserted,
• wherein the first substrate and the second substrate are provided so as to be able to slide with the insulator, the first substrate is formed of a material having a same value as or an approximate value of a coefficient of thermal expansion of the fine circuit board to be measured, and the second substrate is formed of a material having a same value as or an approximate value of a coefficient of thermal expansion of the wiring board for signal input/output, and
• wherein each of the plurality of probe pins includes first and second wave-shaped end portions, and each of the plurality of probe pins is supported due to the first and second wave-shaped end portions abutting and being stopped at the supporting holes of the first substrate and the second substrate, respectively.