In recent years, environmental concerns and energy costs have created a need for lower energy consumption in the fusing systems of printers and copiers. To develop toner for low-energy fusing systems, we are investigating crystalline polyester (C-PES). Toner made from amorphous polyester (A-PES) and C-PES with annealing process shows good fusing ability and durability, as already reported by Fukuri et al. in NIP24. But charging ability of aliphatic C-PES was insufficient because of its monomer structure. In this paper, we report a study to achieve high charging ability by changing the monomer of C-PES from aliphatic diol to aromatic diol. Furthermore, crystallinity of aromatic C-PES can be controlled by adding another monomer which disturbs the symmetrical structure of C-PES. It was observed that the crystal size of aromatic C-PES becomes smaller in the toner, as the amount of another monomer increases. Therefore melting point of C-PES can be decreased. As a result, low energy fusible toner with high charging ability can be obtained.