A flying body comprising: a warning apparatus (28,28a) configured to output a warning (300, 302) in a velocity vector direction of the flying body when the flying body moves downward or in a direction of gravity, wherein the warning apparatus includes a light projection apparatus and/or a warning sound output apparatus; wherein the light projection apparatus is configured to radiate visible light in the velocity vector direction of the flying body (12, 12a), the warning sound output apparatus is configured to output a warning sound in the velocity vector direction of the flying body (12, 12a), the light projection apparatus includes a light source configured to generate the visible light, and a light source actuator configured to adjust a radiation direction of the visible light by changing orientation of the light source, the warning sound output apparatus includes a speaker configured to output the warning sound, and a speaker actuator configured to adjust an output direction of the warning sound by changing orientation of the speaker, the flying body (12, 12a) includes a direction detecting section configured to detect the velocity vector direction of the flying body (12, 12a); and a control section (162a, 164a) that includes a light projection control section if the warning apparatus includes the light projection apparatus and/or a warning sound control section if the warning apparatus includes the warning sound output apparatus, the light projection control section is configured to control the light source and the light source actuator, the warning sound control section is configured to control the speaker and the speaker actuator, the light projection control section is configured to control the light source actuator to radiate the visible light in the velocity vector direction of the flying body (12, 12a) detected by the direction detecting section, the warning sound control section is configured to control the speaker actuator to output the warning sound in the velocity vector direction of the flying body (12, 12a) detected by the direction detecting section. a warning apparatus (28,28a) configured to output a warning (300, 302) in a velocity vector direction of the flying body when the flying body moves downward or in a direction of gravity, wherein the warning apparatus includes a light projection apparatus and/or a warning sound output apparatus; wherein the light projection apparatus is configured to radiate visible light in the velocity vector direction of the flying body (12, 12a), the warning sound output apparatus is configured to output a warning sound in the velocity vector direction of the flying body (12, 12a), the light projection apparatus includes a light source configured to generate the visible light, and a light source actuator configured to adjust a radiation direction of the visible light by changing orientation of the light source, a light source configured to generate the visible light, and a light source actuator configured to adjust a radiation direction of the visible light by changing orientation of the light source, the warning sound output apparatus includes a speaker configured to output the warning sound, and a speaker actuator configured to adjust an output direction of the warning sound by changing orientation of the speaker, a speaker configured to output the warning sound, and a speaker actuator configured to adjust an output direction of the warning sound by changing orientation of the speaker, the flying body (12, 12a) includes a direction detecting section configured to detect the velocity vector direction of the flying body (12, 12a); and a control section (162a, 164a) that includes a light projection control section if the warning apparatus includes the light projection apparatus and/or a warning sound control section if the warning apparatus includes the warning sound output apparatus, the light projection control section is configured to control the light source and the light source actuator, the warning sound control section is configured to control the speaker and the speaker actuator, the light projection control section is configured to control the light source actuator to radiate the visible light in the velocity vector direction of the flying body (12, 12a) detected by the direction detecting section, the warning sound control section is configured to control the speaker actuator to output the warning sound in the velocity vector direction of the flying body (12, 12a) detected by the direction detecting section.