A refrigerator and an ice level sensing apparatus are provided. The refrigerator may include a main body, and an ice level sensing apparatus including an optical element for sending or receiving a signal, and an alignment device for aligning and maintaining alignment of the optical element in a preset direction. The sensing apparatus may sense whether an ice storage container in which ice cubes made by an ice maker is at a full ice level. The optical element may be aligned at a preset position, thus preventing movement of the optical element, resulting in improved reliability of the sensing apparatus.