The utility model discloses a solar cell module for building roofs, comprising standard solar cell modules. The solar cell module further comprises first non-standard modules, a second non-standard module and a third non-standard module. The roof module of the utility model is directly and fixedly connected with a roof, and the adjacent modules are sealed and fixed by sealant to make the whole roof module integrated. The roof module functions as tiles to keep out wind and rain while in power generation.