Robot-arm harness connection structure and multi-joined welding robot

A robot-arm harness connection structure comprising:

• a first arm having a tip end portion;
• a second arm extending in a longitudinal axis thereof, the second arm having a base end at one end thereof along the longitudinal axis, the base end being rotatably coupled to the tip end portion of the first arm through a rotation axis of an arm joint portion;
• and
• a harness extending out from the tip end portion of the first arm and led into the second arm at the arm joint portion of the second arm,
• wherein the tip end portion of the first arm has a harness holding portion for holding one longitudinal end of the harness,
• the arm joint portion has a harness fixing tool for fixing the other longitudinal end of the harness to an inside of the arm joint portion, and
• the harness fixing tool fixes the other longitudinal end of the harness such that a portion of the harness that is adjacent to the other longitudinal end that is fixed by the harness fixing tool is inclined, in a plane parallel to the rotation axis and the longitudinal axis of the second arm, by an acute angle from the longitudinal axis of the second arm and in a direction toward the tip end portion of the first arm.