To upwardly slide a door by a simple composition, and to provide a large opening for taking out cooked food.

The toaster oven is provided with a cooking chamber 2 formed in a body 1, electric heaters (an upper heater 3A and a lower heater 3B) used as heating sources arranged in the cooking chamber 2, a grill 4 for placing an object M to be heated, and the door 5 opening and closing a front opening 2a of the cooking chamber 2. An upper part of the door 5 is composed so as to form one part of a top face 1a in the body 1, the door 5 is composed so it can slide upward, and a large opening is formed in a body 1 front face in a state of the door 5 slid upward and opened.