Striker Ben Strevens netted a brace as struggling Dagenham secured a much-needed victory and condemn Bury to their fifth consecutive league defeat.
The Daggers began impressively, with lively midfielder Sam Saunders going close twice in the first eight minutes.
Saunders was rewarded when his right-wing cross found Strevens unmarked to head home the opener.
And Strevens tapped in after home keeper Jim Provett dropped a Saunders cross at his feet six yards out.
Bury: Provett, Futcher, Haslam (Dorney 76), Challinor, Morgan (Parrish 54), Baker, Buchanan, Woodthorpe, Bishop, Hurst (Rouse 83), Adams.
Subs Not Used: Hughes, McAllister.
Dag & Red: Roberts, Foster, Okuonghae, Uddin, Griffiths, Saunders (Taylor 89), Southam, Huke, Sloma (Green 66), Strevens, Nurse (Moore 83).
Subs Not Used: Thompson, Cook.
Goals: Strevens 21, 62.
Ref: Dean Whitestone (Northamptonshire).