Thermal conductivity measurement apparatus and thermal conductivity measurement method

A thermal conductivity measurement apparatus comprising:

• a first holding member having a contact end face coming into contact with an object to be measured and a distal end face disposed on the side opposite to the contact end face;
• a second holding member having a contact end face coming into contact with the object to be measured and a distal end face disposed on the side opposite to the contact end face, the second holding member holding the object to be measured together with the first holding member;
• a heating member having an abutting end face abutting on the distal end face of the first holding member and a distal end face disposed on the side opposite to the abutting end face, the heating member heating the first holding member;
• a cooling member having an abutting end face abutting on the distal end face of the second holding member and a distal end face disposed on the side opposite to the abutting end face, the cooling member cooling the second holding member;
• a plurality of temperature sensors disposed in the first holding member and the second holding member;
• and
• a pressing force application mechanism applying a pressing force to the first holding member, the second holding member, and the object to be measured, wherein
• at least one of the distal end face of the first holding member, the distal end face of the second holding member, the abutting end face of the heating member, the distal end face of the heating member, the abutting end face of the cooling member, and the distal end face of the cooling member has a convex curved shape.