A moving object having a front-rear direction, a width direction and a vertical direction and being provided with a fairing device, the fairing device comprising: a main wing (2, 32, 32a; 32a1 to 32a4; 32b1 to 32b4; 32c; 32d; 32e; 32e1 to 32e4) that protrudes in a second direction (Y; Z) intersecting a first direction as the front-rear direction of the moving object; and an auxiliary wing (3, 33, 33a; 33b; 33c; 33d; 33e; 33f1 to 33f4; 33g1 to 33g4; 33h; 33i1, 33i2; 33j1, 33j3; 33k1 to 33k8) that is disposed so as to be separated from the main wing (2, 32, 32a; 32a1 to 32a4; 32b1 to 32b4; 32c; 32d; 32e; 32e1 to 32e4) and faces the main wing (2, 32, 32a; 32a1 to 32a4; 32b1 to 32b4; 32c; 32d; 32e; 32e1 to 32e4) at the front part side of the main wing (2, 32, 32a; 32a1 to 32a4; 32b1 to 32b4; 32c; 32d; 32e; 32e1 to 32e4), wherein a wing chord length of the auxiliary wing (3, 33, 33a; 33b; 33c; 33d; 33e; 33f1 to 33f4; 33g1 to 33g4; 33h; 33i1, 33i2; 33j1, 33j3; 33k1 to 33k8) is shorter than a wing chord length of the main wing (2, 32, 32a; 32a1 to 32a4; 32b1 to 32b4; 32c; 32d; 32e; 32e1 to 32e4), wherein the wing thickness of the main wing (2, 32, 32a; 32a1 to 32a4; 32b1 to 32b4; 32c; 32d; 32e; 32e1 to 32e4) positioned at the rear side of a rear edge of the auxiliary wing (3, 33, 33a; 33b; 33c; 33d; 33e; 33f1 to 33f4; 33g1 to 33g4; 33h; 33i1, 33i2; 33j1, 33j3; 33k1 to 33k8) in the first direction decreases toward a rear edge, wherein a gap between a front edge of the auxiliary wing (3, 33, 33a; 33b; 33c; 33d; 33e; 33f1 to 33f4; 33g1 to 33g4; 33h; 33i1, 33i2; 33j1, 33j3; 33k1 to 33k8) and the main wing (2, 32, 32a; 32a1 to 32a4; 32b1 to 32b4; 32c; 32d; 32e; 32e1 to 32e4) is wider than a gap between the rear edge of the auxiliary wing (3, 33, 33a; 33b; 33c; 33d; 33e; 33f1 to 33f4; 33g1 to 33g4; 33h; 33i1, 33i2; 33j1, 33j3; 33k1 to 33k8) and the main wing (2, 32, 32a; 32a1 to 32a4; 32b1 to 32b4; 32c; 32d; 32e; 32e1 to 32e4), and wherein the main wing (2, 32, 32a; 32a1 to 32a4; 32b1 to 32b4; 32c; 32d; 32e; 32e1 to 32e4) and the auxiliary wing (3, 33, 33a; 33b; 33c; 33d; 33e; 33f1 to 33f4; 33g1 to 33g4; 33h; 33i1, 33i2; 33j1, 33j3; 33k1 to 33k8) are provided in a side portion of the moving object or at the lower side of the moving object, and the main wing (2, 32, 32a; 32a1 to 32a4; 32b1 to 32b4; 32c; 32d; 32e; 32e1 to 32e4) has a shape in which the main wing (2, 32, 32a; 32a1 to 32a4; 32b1 to 32b4; 32c; 32d; 32e; 32e1 to 32e4) has a wing thickness in the vertical direction of the moving object or in the width direction of the moving object. a main wing (2, 32, 32a; 32a1 to 32a4; 32b1 to 32b4; 32c; 32d; 32e; 32e1 to 32e4) that protrudes in a second direction (Y; Z) intersecting a first direction as the front-rear direction of the moving object; and an auxiliary wing (3, 33, 33a; 33b; 33c; 33d; 33e; 33f1 to 33f4; 33g1 to 33g4; 33h; 33i1, 33i2; 33j1, 33j3; 33k1 to 33k8) that is disposed so as to be separated from the main wing (2, 32, 32a; 32a1 to 32a4; 32b1 to 32b4; 32c; 32d; 32e; 32e1 to 32e4) and faces the main wing (2, 32, 32a; 32a1 to 32a4; 32b1 to 32b4; 32c; 32d; 32e; 32e1 to 32e4) at the front part side of the main wing (2, 32, 32a; 32a1 to 32a4; 32b1 to 32b4; 32c; 32d; 32e; 32e1 to 32e4), wherein a wing chord length of the auxiliary wing (3, 33, 33a; 33b; 33c; 33d; 33e; 33f1 to 33f4; 33g1 to 33g4; 33h; 33i1, 33i2; 33j1, 33j3; 33k1 to 33k8) is shorter than a wing chord length of the main wing (2, 32, 32a; 32a1 to 32a4; 32b1 to 32b4; 32c; 32d; 32e; 32e1 to 32e4), wherein the wing thickness of the main wing (2, 32, 32a; 32a1 to 32a4; 32b1 to 32b4; 32c; 32d; 32e; 32e1 to 32e4) positioned at the rear side of a rear edge of the auxiliary wing (3, 33, 33a; 33b; 33c; 33d; 33e; 33f1 to 33f4; 33g1 to 33g4; 33h; 33i1, 33i2; 33j1, 33j3; 33k1 to 33k8) in the first direction decreases toward a rear edge, wherein a gap between a front edge of the auxiliary wing (3, 33, 33a; 33b; 33c; 33d; 33e; 33f1 to 33f4; 33g1 to 33g4; 33h; 33i1, 33i2; 33j1, 33j3; 33k1 to 33k8) and the main wing (2, 32, 32a; 32a1 to 32a4; 32b1 to 32b4; 32c; 32d; 32e; 32e1 to 32e4) is wider than a gap between the rear edge of the auxiliary wing (3, 33, 33a; 33b; 33c; 33d; 33e; 33f1 to 33f4; 33g1 to 33g4; 33h; 33i1, 33i2; 33j1, 33j3; 33k1 to 33k8) and the main wing (2, 32, 32a; 32a1 to 32a4; 32b1 to 32b4; 32c; 32d; 32e; 32e1 to 32e4), and wherein the main wing (2, 32, 32a; 32a1 to 32a4; 32b1 to 32b4; 32c; 32d; 32e; 32e1 to 32e4) and the auxiliary wing (3, 33, 33a; 33b; 33c; 33d; 33e; 33f1 to 33f4; 33g1 to 33g4; 33h; 33i1, 33i2; 33j1, 33j3; 33k1 to 33k8) are provided in a side portion of the moving object or at the lower side of the moving object, and the main wing (2, 32, 32a; 32a1 to 32a4; 32b1 to 32b4; 32c; 32d; 32e; 32e1 to 32e4) has a shape in which the main wing (2, 32, 32a; 32a1 to 32a4; 32b1 to 32b4; 32c; 32d; 32e; 32e1 to 32e4) has a wing thickness in the vertical direction of the moving object or in the width direction of the moving object.