A lawn mower includes a housing having a cutting chamber defined by a top wall and a circumferential sidewall. A side discharge opening is provided on the sidewall. A side discharge chute selectively opens and closes the discharge opening. The discharge chute has a side door pivoted to the sidewall about a vertical pivot axis and a top deflector pivoted to the side door about a substantially horizontal pivot axis. When the discharge chute is in an open position to open the discharge opening to the flow of grass clippings, the top deflector pivots downwardly on the side door into an inclined position to intercept the grass clippings and direct them downwardly towards the ground.