A refrigerator is provided to maximize the size of an opening in order for the opening to close an assist door by arranging a sealing member between an opening inner leading end part of the sealing member and an outer leading end of the assist door. A refrigerator comprises: a main body in which a storage room is in the inside while being opened to one side; a door opening and closing the storage room; an opening(22) located in the door; an assist door(40) opening and closing the opening, having a floor pivotally installed at the opening bottom; and a sealing member(41) arranged between the inner end of the opening and the outer end of the assist door, detecting the cool air leakage passing between the inner end of the opening and the outer end of the assist door.
