Abstract: A key incorporating a miniature light source in a handle thereof, is disclosed. A key body member comprises a substantially elongated first portion and a second portion disposed in an angular relationship to the first portion. The handle of the key comprises a retainer member which incorporates a channel adapted for slidably receiving and retaining the second portion of the key body member. A locking member, comprising a part of the handle, is adapted for interfacing with the retainer member and for removable attachment thereto. A tab protruding from the locking member is disposed adjacent to an opening of the channel thereby locking the key body member into the assembled structure. A suitable cavity is provided within the handle member for operative mounting of a miniature power source, a miniature light bulb and a pressure actuated switch.