Signal transmission line including a flexible resin laminate having interior hollow portions overlapping the signal transmission line with the hollow portions having a vent hole

A signal transmission line comprising:

• a laminate including a plurality of resin layers each of which has flexibility, the plurality of resin layers being laminated, and the laminate having flexibility;
• a signal conductor extending in a signal transmission direction of the laminate and being provided in an intermediate position in a laminating direction in which the plurality of resin layers are laminated;
• a hollow portion provided in the laminate and defined by an opening provided at a portion of the plurality of resin layers;
• and
• a reinforcing conductor provided in the laminate;
• wherein
• the hollow portion is disposed at a position that overlaps with the signal conductor when viewed in the laminating direction;
• the hollow portion is exposed to outside of the laminate through a vent hole provided in the laminate;
• and
• the reinforcing conductor is disposed at a position different from the position of the hollow portion when viewed in the laminating direction.