A landing assistance system includes a module for acquiring environment and current flight parameters of the aircraft, a module for generating flight and navigation symbology to be displayed on the display device at least from current flight parameters, a module for generating a land topography of terrain overflown by the aircraft, a transmission module configured to transmit a signal to the display device that represents the flight and navigation symbology and the synthetic representation, the symbology generating module including a sub-module for displaying a mock-up at a predetermined non-zero positive pitch angle relative to a median line of the display zone. The system allows a landing to occur in good conditions by virtue of the enlargement of the lower part of the display zone.