Strain sensor fixing device and torque sensor using the same

A torque sensor characterized by comprising:

• a first structure;
• a second structure;
• a plurality of third structures connecting between the first structure and the second structure;
• strain bodies each of which is provided between the first structure and the second structure and constitutes a strain sensor;
• first fixing devices each of which is provided on the first structure and fixes a first end of the strain body to the first structure;
• and
• second fixing devices each of which is provided on the second structure and fixes a second end of the strain body to the second structure, wherein
• each of the first fixing device and the second fixing device includes a fixing member which includes a first side, a second side parallel to the first side, and a face provided between the first side and the second side and including an opening, and in which the face is provided at a position separate from a line extending between distal ends of the first side and the second side, the first side is brought into contact with the first structure, and the second side is brought into line contact with an end part of the strain body constituting the strain sensor, the end part being provided on the first structure, and
• a screw to be inserted into the opening and to be screwed into the first structure.