To provide a parabola antenna cover preventing snow accretion and water accretion, preventing an attenuated reception radio wave and a disabled radio wave reception state caused by snow accretion, with a remarkable reduction of an initial cost and a running cost.

A parabola antenna cover 100 preventing snow accretion and water accretion, to be used by mounting on a reflector plate 10 of a parabola antenna, includes: a cover body 110 mountable on the reflector plate 10, by covering the front of the reflection surface 12 of the reflector plate 10 in a state that a peripheral edge portion is folded to the rear face side of the reflector plate 10 across the outer edge of the reflector plate 10; and in a state that the cover body 110 is mounted on the reflector plate 10, a plurality of guide bodies 120 attached on the rear face 14 of the cover body 110, i.e. on the reflection surface side, in a manner to extend to the vertical directions of the cover body 110.