To obtain a roofing material whose colored glass can be safely recycled by providing a sheet material, asphalt stuck to the sheet material having a specified thickness, rounded glass grains stuck onto the asphalt.

A sheetlike base paper is impregnated with asphalt 2 and applied therewith and glass particles 3 are spread over on the surface of the asphalt 2. In this time, a fibrous fabric, a nonwoven fabric, or a paper material can be used for the base paper 1. Used glass bottles are crushed and screened to get the glass particles. Further, the crushed glass pieces 3 are rounded and used as a material for the roofing material 4. In this way, waste glass can be recycled and the handling danger can be reduced. Moreover, the glass particles are prevented from coming off from asphalt and the weight of the roofing material can be reduced.