To provide a screw conveying type cooling device using liquefied gas which can securely cool an article to a predetermined temperature by contacting the article and the liquefied gas sufficiently, can prevent foreign material from being contained in the cooled article, and has excellent cleaning properties.

A heat insulating tank 11 for storing the liquefied gas is formed of a bottomed box shaped main body part 13, and a cover member 14 provided detachably on an upper opening of the main body part. A partitioning member 24, which a screw shaft 12a passes through, is provided on an upper side of a screw 12 arranged in an inclined state and facing upward in an article conveying direction, and partitions the heat insulating tank into a screw side section 11a and a drive side section 11b. A tip end of the screw shaft passing through the partitioning member into the drive side section and a tip end of a drive shaft 19 of a drive means 18 passing through a side wall 3c of the heat insulating tank main body part are detachably connected by a connection member 20.