A method for bending glass sheets in an apparatus and an apparatus for bending glass sheets, the apparatus comprising at least one compartment heating the glass sheet to be bent, a press bending station which comprises a male mould to bend a glass sheet, brought through at least one compartment heating the glass sheet to the press bending station by pressing it, and at least one conveyor to transport a mould trolley that may be provided with a female mould and a glass sheet placed on the female mould through the at least one compartment heating the glass sheet to the press bending station. In order to replace the male mould in use at the press bending station with a male mould to be used next, a trolley is delivered which is suitable for carrying the male mould to the press bending station to receive the male mould to be removed from use on said trolley to carry the male mould to be removed from use away from the press bending station by said trolley, and a trolley is delivered which is suitable for carrying a male mould and provided with the male mould to be brought into use to the press bending station in order to carry the male mould to be brought into use to the press bending station.