Illuminating key

The utility model relates to an illuminating key which is composed of an upper cover, a lower cover, a key body and an illuminating apparatus, wherein, the key body is arranged between the upper cover and the lower cover; one end of the key body is tubular, the other end is tabular, and the middle is provided with a groove; the shape of the groove can be determined in this way, that the groove can just contain the illuminating apparatus; the illuminating apparatus is composed of a light emitting device and a power supply and is arranged between the upper and the lower covers; one end of the light emitting device is inserted in a pipeline of the key body. Compared with the past illuminating key, the utility model has the advantages of small size and convenient carrying. Moreover, when a lock is opened, light is concentrated on a lock hole so that the use is more convenient.