To provide an open showcase allowing stable execution of energy-saving operation when an opening is blocked with a night cover.

The open showcase 1 discharging cold air to the opening 12 of a storage chamber 11 by internal fans 27, 28 to cool the inside of the storage chamber 11 while forming a cold air curtain, and comprising the night cover 51 for covering the opening 12, includes a lighting device 36 or the like for illuminating the inside of the storage chamber 11; a temperature sensor 22 inside the storage chamber 11; and a control device 20. When the lighting device 20 is put out, the control device 20 carries out energy-saving operation for raising the set temperature in the storage chamber 11 on condition that the temperature in the storage chamber 11 detected by the temperature sensor 22 is near the set temperature.