Abstract: A low-temperature liquefied gas outflow device wherein an outflow nozzle having a plurality of through-holes is provided through the base of a heat-insulating container having an opening at the top, and a cover member closing the opening, a control device for selectively opening or closing any desired number of the plurality of through-holes provided in the outflow nozzle is provided. The heat-insulating container has a level sensor located within the heat-insulating container, a liquefied gas supply conduit running through the cover member, a vaporized-gas exhaust conduit provided in the cover member, and a check valve inserted into the liquefied gas supply conduit, operating in response to a signal from the level sensor. The control device for selectively opening or closing the through-holes comprises a plurality of valve elements for selectively closing the through-holes, and an elevation cylinder for controlling the operation of the plurality of valve elements.