PURPOSE: To introduce more fishes into a bag net than by conventional method by forming vertical shielding walls comprising air bubbles in the offing on the extension lines of fence nets constituting one portion of a fixed shore net.

CONSTITUTION: In a fixed shore net having fence nets 14 and a bag net 13, vertical shielding walls 12 more comprising air bubbles are formed along the extension lines directed to the offing from the end portions of the fence nets 14. The vertical shielding walls 12 comprising the air bubbles are formed e.g., by attaching a weight to a tube provided with a plurality of air bubble- discharging openings 2 along the upper portion thereof and connecting the tube 1 to a compressed air-supplying tube 15.