Chemical substance concentrator and chemical substance detection device

A chemical substance concentrator configured to concentrate a chemical substance contained in a gaseous sample, the concentrator comprising:

• a flow passage having a hollow part allowing the gaseous sample flows through the hollow part, the flow passage having a first inner wall facing the hollow part;
• a first electrode disposed on the first inner wall of the flow passage;
• a second electrode disposed on the first inner wall and located away from the first electrode;
• a first electrode wiring connected to the first electrode and to the second electrode, the first electrode wiring generating heat upon being energized;
• a first material layer disposed on the first electrode wiring so as to transmit the generated heat;
• and
• a first adsorbent disposed on the first material layer, the first adsorbent configured to adsorb the chemical substance and to desorb, by the transmitted heat, the adsorbed chemical sub stance.