Two goals in as many minutes moved Arbroath up to third in the table as East Fife lost at Gayfield.
Steven Doris fired the hosts into the lead on 26 minutes.
And Derek Holmes' tap-in doubled the lead less than two minutes later.
Doris also went close with a long-range strike while East Fife rarely threatened.
Morrison, Baxter, Hamilton, Malcolm, Keddie, Rennie (Birse 87), Kerr, Scott Robertson (Currie 63), Sheerin, Holmes (Gribben 74), Doris. Subs Not Used: Bullock, Sibanda.
Doris 26, Holmes 28.
Michael Brown, Durie, Scott Smith, White, Forster, Willis, Darren Smith, Muir, Pollock (Robert Sloan 57), Paul McManus, Wardlaw (McBride 57). Subs Not Used: Shaw, Cook, McCormack. Booked: Pollock, Michael Brown.