Dunfermline eased to victory at East End Park with second-half goals from Stephen Simmons and Stephen Glass.
The Pars looked the more threatening side in a goalless opening half, with Jim Hamilton's header from David Murphy's cross well saved.
Dunfermline took the lead four minutes after half-time when Simmons swept home Murphy's cross.
Victory was sealed seven minutes from time when Glass saw his shot cannon off the post and creep over the line.
Dunfermline: Gallacher, Woods, Wilson, Simmons,
Scott Thomson (Harris 76), Murphy, Harper (Crawford 81), Glass, Burchill, Hamilton, McIntyre (Phinn 71). Subs Not Used: McManus, Murdoch.
Goals: Simmons 51, Glass 83.
Morton: McGurn, MacGregor (Weatherson 56), McLaughlin, Harding, Greacen, Smith, Finlayson, McGuffie, Russell (Graham 76), Millar, McAlistair. Subs Not Used: Stevenson, McAnespie, Robinson.