To provide an automatic vending machine capable of making maintenance work easy while saving energy.

The automatic vending machine cooks and serves a selected article when a required amount of money is input and an article is selected, and has a control means 40 for setting the vending machine to a normal operation mode while it is in an ordinary state and to an energy saving operation mode when the current time is in a prescribed energy saving period of time in which at least temperature of hot water used for cooking an article is kept lower than that during the normal operation mode. When a front door 2 for opening and closing a front opening of a main cabinet 1 is opened while the energy saving operation mode is set by the control means 40, it cancels the energy saving operation mode and sets to the normal operation mode.