A refrigerated showcase is provided that can easily carry out a maintenance operation and the like of a cooling mechanism disposed in a machine chamber. A machine chamber 13 is defined on a side of a heat insulating box 16 defining a storage chamber 12 and also provided with a cooler to cool the storage chamber 12 to have a cooling mechanism 80 disposed therein to circularly supply a refrigerant to the cooler, and a front side of the storage chamber 12 and the machine chamber 13 is covered with a single front glass 14. Then, a side of the machine chamber 13 is defined by a detachable second side panel to configure the machine chamber 13 to open laterally in a state of removing the second side panel, and also the cooling mechanism 80 is placed on a unit base 38 drawable from the machine chamber 13 to configure to allow the unit base 38 to be drawn from the machine chamber 13 via a side opening of the machine chamber 13 opened by removing the second side panel.