PURPOSE: A cooker is provided to prevent a door from grating when opening and closing by proving a structure of the door. CONSTITUTION: A main body has a cooking chamber opened and closed with a door. A door opening and closing unit(500) guides the door to move to a first direction and a second direction from the main body. A connecting member(530) connects the door and the door opening a closing unit. An ascent and descent guide(510) moves the door up and down.
