A cooling unit arrangement including at least two mutually arranged shelf modules, with a base group, a rear wall group and an upper group with respective covering parts and forming a cooling chamber, and a cooling device. The shelf modules have identical modular parts with frame profiles and which support the base group, the rear wall group and the upper group and at least the rear wall group of each shelf module is equipped with components of the cooling device. Said shelf arrangement is provided with a common evaporator arranged in the rear wall group and extending along several or all shelf modules.