To provide a protective cover which simply covers without being affected by wind in the case of covering the protective cover on an agricultural machinery or the like, and also securely covers over a part improper to get wet by water rain or the like.

The conventional protective cover of the agricultural machinery is integrally provided by attaching a sheet material 1 to a net member 2 or tying with strings or the like for the part improper to get wet by water rain or the like. A hook 3 is connected with an elastic member 4 and mounted to the four corners of the net member and the side parts to cover whole part of the agricultural machinery such as a tractor and a combine or the like with a sheet material. The invented protective cover A of the agricultural machinery securely covers the part improper to get wet by water rain or the like, for example, a threshing part 6, a driver's sheet 7 or the like with a sheet material 1, and can cover the protective cover the agricultural machinery or the like without soaring of the protective cover in the wind, using a net member 2 to the other parts.