A robot (1) includes two claw portions (10A,10B) having a recess formed in each of the grip portions which grip an object. The recess has a proximal-end-side surface and a distal-end-side surface. When an intersection between a straight line included in the proximal-end-side surface and a straight line included in the distal-end-side surface is a base point, a line passing through the base point is a base line, a line between the two claw portions, passing through an end point of the recess and orthogonal to the base line is an orthogonal line, the angle (α) made between the base line, and the straight line included in the distal-end-side surface is greater than 0 degrees and less than 90 degrees, the angle (β) made between the orthogonal line, and the straight line included in the proximal-end-side surface is greater than 0 degrees and less than 90 degrees, and the length (d) from the base point to the orthogonal line is greater than 0.
