A microwave oven includes a shell defining a cooling air inlet and a cooling air outlet therein; a compartment defining a cavity, nested in the shell and defining an open front end, a receiving space being defined between a rear plate of the compartment and a rear plate of the shell; a first electric member and a second electric member disposed in the receiving space respectively; and a fan disposed in the receiving space, defining a first air inlet, a second air inlet, a first air outlet communicated with the first air inlet to define a first air blowing channel, and a second air outlet communicated with the second air inlet to define a second air blowing channel, the fan being configured to cool the first electric member via the first air blowing channel and to cool the second electric member via the second air blowing channel.