To make uniform the wind-velocity distribution of the air blown from the supply opening (supply duct) of an air curtain device for refrigerated vehicle in which an air supplying means is arranged in such a way that the means is offset from the width direction of the supply duct.

A refrigerated vehicle is provided with a supply duct 24 which blows the air (outside air) blown from a blower 23 from the bottom side to the top side of the door opening of a walk-in deep freezer so as to for an air curtain at the door opening with the air flow blown from the duct 24. The blower 23 has a narrower width than the duct 24 has and is arranged in such a way that the blower 23 is offset from the width direction of the center of the duct 24 by a prescribed amount L. In addition, a multi-perforated member 246 which is extended in the direction perpendicular to the flowing direction of the blown air and generates a pressure loss in the flow of the blown air is arranged in the duct 24.