The invention is a container refrigeration case having at least one cooling air duct extending through a wide area of a rear wall unit and top unit, having a bottom region that accommodates a rolling container, and having side wall units. Cooling air is guided to circulate through the cooling air duct, a cooling air curtain traveling from top to bottom on the front side, and across the bottom region. The bottom region has a flat bottom structure situated under the container, an inner cover oriented toward the cooling chamber, and a floor-side duct section embodied under the inner cover which routes the cooling air duct from the front side to the lower, rear section of the cooling air duct.