A load-bearing frame of a bicycle saddle comprises a base and a rim surrounding the base. The base is made of a first plastic material of predetermined rigidity and includes a relatively narrow anterior portion and a relatively wider posterior portion. The base further has a top surface, a bottom surface, and a peripheral edge. The rim is made of a second plastic material of rigidity being smaller than that of the first plastic material. The rim has an inner side coupled with the periphery edge of the base and an outer side extending upwardly from the inner side to define a first receiving space with a first upper opening.