An aerial vehicle safety apparatus (100; 200; 300; 400; 500; 690; 790) attachable to an aerial vehicle (30; 230, 330; 430; 630; 730) including a propulsive mechanism (32; 132; 232; 332; 432; 632; 732), the aerial vehicle safety apparatus (100; 200; 300; 400; 500; 690; 790) comprising: a safety mechanism (10; 110; 310; 386; 486; 610; 710) used for securing safety of at least one of the aerial vehicle (30; 230, 330; 430; 630; 730) and an object outside the aerial vehicle (30; 230, 330; 430; 630; 730); a drive mechanism (50, 60; 150, 160; 250, 260; 386a, 386b; 486a) including at least one drive unit serving as a drive source of the safety mechanism (10; 110; 310; 386; 486; 610; 710); an ejection mechanism (88; 378, 388; 488) capable of ejecting the drive mechanism (50, 60; 150, 160; 250, 260; 386a, 386b; 486a) together with the safety mechanism (10; 110; 310; 386; 486; 610; 710); and a control mechanism that controls operations of the drive mechanism for the drive mechanism to drive the safety mechanism (10; 110; 310; 386; 486; 610; 710) after the ejection mechanism starts ejection of the safety mechanism (10; 110; 310; 386; 486; 610; 710), wherein the safety mechanism (10; 110; 310; 386; 486; 610; 710) includes an expandable object that is wound or folded in a non-expanded state, the expandable object being capable of generating at least one of lift and buoyancy in an expanded state, the ejection mechanism (88; 378, 388; 488) includes an ejection apparatus coupled to the expandable object with a coupling member (351, 451) being interposed, the ejection apparatus being configured to eject the non-expanded expandable object into air, and the drive mechanism (50, 60; 150, 160; 250, 260; 386a, 386b; 486a) includes an expansion mechanism provided in the expandable object, the expansion mechanism being configured to expand the expandable object. a safety mechanism (10; 110; 310; 386; 486; 610; 710) used for securing safety of at least one of the aerial vehicle (30; 230, 330; 430; 630; 730) and an object outside the aerial vehicle (30; 230, 330; 430; 630; 730); a drive mechanism (50, 60; 150, 160; 250, 260; 386a, 386b; 486a) including at least one drive unit serving as a drive source of the safety mechanism (10; 110; 310; 386; 486; 610; 710); an ejection mechanism (88; 378, 388; 488) capable of ejecting the drive mechanism (50, 60; 150, 160; 250, 260; 386a, 386b; 486a) together with the safety mechanism (10; 110; 310; 386; 486; 610; 710); and a control mechanism that controls operations of the drive mechanism for the drive mechanism to drive the safety mechanism (10; 110; 310; 386; 486; 610; 710) after the ejection mechanism starts ejection of the safety mechanism (10; 110; 310; 386; 486; 610; 710), wherein the safety mechanism (10; 110; 310; 386; 486; 610; 710) includes an expandable object that is wound or folded in a non-expanded state, the expandable object being capable of generating at least one of lift and buoyancy in an expanded state, the ejection mechanism (88; 378, 388; 488) includes an ejection apparatus coupled to the expandable object with a coupling member (351, 451) being interposed, the ejection apparatus being configured to eject the non-expanded expandable object into air, and the drive mechanism (50, 60; 150, 160; 250, 260; 386a, 386b; 486a) includes an expansion mechanism provided in the expandable object, the expansion mechanism being configured to expand the expandable object.