Probe unit

A probe unit comprising:

• a first contact probe configured to come in contact with a signal electrode provided on a contact target on one end side in a longitudinal direction;
• a second contact probe configured to come in contact with a ground electrode provided on the contact target on one end side in a longitudinal direction;
• a probe holder including
• a first holder hole through which the first contact probe passes, and
• a second holder hole through which the second contact probe passes;
• and
• a conductive floating member including
• a first through hole to which the one end of the first contact probe is inserted from one end side and the signal electrode is inserted from another end side, and
• a second through hole to which the one end of the second contact probe is inserted from one end side and the ground electrode is inserted from another end side,
• wherein the probe holder is configured such that at least an inner circumferential surface of the first holder hole has an insulating property, and
• the probe unit has a coaxial structure in which a central axis of the first contact probe and a central axis of the first through hole of the floating member are aligned with each other.