A moving body (100, 102,103) configured to move autonomously, comprising: a first light emitting device (125, 128) which includes a first plurality of light emitting parts (125a-125l) and which is configured to emit light in radial directions with respect to a vertical axis of the moving body (100, 102, 103); and an acquisition unit configured to acquire a moving direction of the moving body (100, 102, 103); characterized in that each of the first plurality of light emitting parts (125a-125l) of the first light emitting device (125, 128) is configured to emit light with a plurality of luminous colors, wherein each luminous color is previously associated with a respective direction of the radial directions with reference to the moving direction of the moving body (100, 102, 103) acquired by the acquisition unit, wherein the first light emitting device (125, 128) is installed so as to be able to emit light with at least one of the plurality of luminous colors within an arbitrary range of 180° in the radial directions; wherein the moving body (100, 102, 103) further comprises a light-emitting control unit configured to receive from the acquisition unit, the moving direction of the moving body (100, 102, 103), and to control each light emitting part of the first plurality of light emitting parts (125a-125l) to emit light with the respective luminous color previously associated with the respective direction of the radial directions with reference to the moving direction acquired by the acquisition unit, wherein the plurality of luminous colors include at least: a first specified color associated with the moving direction, a second specified color associated with a direction opposite to the moving direction; a third specified color associated with a right side direction with respect to the moving direction; and a fourth specified color associated with a left side direction with respect to the moving direction. a first light emitting device (125, 128) which includes a first plurality of light emitting parts (125a-125l) and which is configured to emit light in radial directions with respect to a vertical axis of the moving body (100, 102, 103); and an acquisition unit configured to acquire a moving direction of the moving body (100, 102, 103); characterized in that each of the first plurality of light emitting parts (125a-125l) of the first light emitting device (125, 128) is configured to emit light with a plurality of luminous colors, wherein each luminous color is previously associated with a respective direction of the radial directions with reference to the moving direction of the moving body (100, 102, 103) acquired by the acquisition unit, wherein the first light emitting device (125, 128) is installed so as to be able to emit light with at least one of the plurality of luminous colors within an arbitrary range of 180° in the radial directions; wherein the moving body (100, 102, 103) further comprises a light-emitting control unit configured to receive from the acquisition unit, the moving direction of the moving body (100, 102, 103), and to control each light emitting part of the first plurality of light emitting parts (125a-125l) to emit light with the respective luminous color previously associated with the respective direction of the radial directions with reference to the moving direction acquired by the acquisition unit, wherein the plurality of luminous colors include at least: a first specified color associated with the moving direction, a second specified color associated with a direction opposite to the moving direction; a third specified color associated with a right side direction with respect to the moving direction; and a fourth specified color associated with a left side direction with respect to the moving direction. to receive from the acquisition unit, the moving direction of the moving body (100, 102, 103), and to control each light emitting part of the first plurality of light emitting parts (125a-125l) to emit light with the respective luminous color previously associated with the respective direction of the radial directions with reference to the moving direction acquired by the acquisition unit, wherein the plurality of luminous colors include at least: a first specified color associated with the moving direction, a second specified color associated with a direction opposite to the moving direction; a third specified color associated with a right side direction with respect to the moving direction; and a fourth specified color associated with a left side direction with respect to the moving direction. a first specified color associated with the moving direction, a second specified color associated with a direction opposite to the moving direction; a third specified color associated with a right side direction with respect to the moving direction; and a fourth specified color associated with a left side direction with respect to the moving direction.