To provide a light emitting tool that comprises a case, a battery installation part, an LED, and a control part for making the LED emit light, and in which the form of the case is easy to change.SOLUTION: A light emitting tool 1 comprises: a light emitting unit 3 comprising a frame 7, an operation part 11 provided in the frame 7, a light emitting body 13 provided in the frame 7, and for emitting light, and a control part provided in the frame 7, and for, when the operation part 11 is operated, making the light emitting body 13 emit light in response to the operation; and a case 5 of which at least a portion is formed of a material for transmitting light, and in which a light emitting unit installation part 17 inside which the light emitting unit 3 is installed is formed by assembling a plurality of case constituent members 5A, 5B, and 5C.SELECTED DRAWING: Figure 3