To provide a gate-shaped air curtain utilizing feature of a centrifugal fan, reducing power consumption, noise and weight, and realizing uniform air supply.

This gate-shaped air curtain is composed of: right and left housings separated from each other and respectively having air supply openings and air suction openings; and a top plate connecting the housings. A plurality of paired air channels are formed by forming the supply opening on one of opposite faces of the right and left housings, and the suction opening on the other side to form air barrier circulated between the right and left housings. The plurality of centrifugal fans each composed of a motor, a centrifugal fan and a scroll, are longitudinally arranged at the supply openings, and a common nozzle is mounted to lump the air supply parts of the centrifugal fan units to uniformize the supplied air.