Probe holder and probe unit

A probe unit, comprising:

• a contact probe that comes into contact respectively, at both ends of a longitudinal length of the contact probe, with target electrodes;
• and
• a probe holder including an insulating main body configured to hold the contact probe, wherein
• the probe holder includes:
• a first layered member including a plurality of members layered over one another;
• and
• a second layered member bonded to the first layered member and including a plurality of members layered over one another, wherein
• each of the first and second layered members includes:
• a first member made of a material having a low dielectric constant;
• a second member provided on one of surfaces of the first member and having higher hardness than the first member;
• and
• a third member provided on the other surface of the first member and having higher hardness than the first member, and
• the probe holder further comprises a holder hole formed by bonding the third members of the first and second layered members, the holder hole penetrating the probe holder in a direction in which the first and second layered members are layered over each other, and having a stepped hole shape having a smaller diameter in the second members.