A glass sheet, which has been heated to have a viscosity of not lower than 105 Pa·s and not higher than 108 Pa·s, is pressed against a mold having a certain bending surface to be bent. There are a step for controlling a bending temperature T and a bending time period t for the glass sheet so as to satisfy the following formulas 1 and 2, and a step for bending the glass sheet:0.05<φ<2.00Formula 1