An ice making machine may include an ice tray, a drive unit which is provided at one end of the ice tray and is structured to turn the ice tray, a frame body which supports the ice tray and the drive unit, and a cold air duct which connects an opening formed in the frame body with the cold air supply port. The frame body is provided with a wall part which faces the drive unit at the other end of the ice tray and the opening is formed in the wall part. The cold air duct is provided with an inclined flow passage part inclined with respect to a direction where an ice making recessed part in the ice tray is opened, and the inclined flow passage part is provided with a cold air blowing outlet which faces the ice making recessed part.