AFC remain winless on the road in the league after in-form Bridlington won a close end-to-end encounter on the coast.
Seasiders top-scorer Joe McFayden headed home the only goal of the game early on, whilst Ross Duggan was denied by the woodwork twice.
The Bulls began the first half brightly and had themselves a good early opportunity when Duggan fed Jordan Annable nicely into the right channel, but the full-back's low delivery couldn't be finished off by Jack Warner at the far post.
Joe McFayden then fancied his chances from range, but aimed wide of Hugo Warhurst's net with his low drive.
AFC continued to look bright and with a bit more fortune Luke Walker would have found the net after being laid off nicely by Warner.
But despite the bright start it were the Seasiders who drew first blood, with McFayden nodding home the simplest of chances after a man in red broke free on the right.
Ross Duggan could have counted himself unlucky to not yet be on the score sheet, striking the post twice in two minutes, with the second chance seeing the striker lob James Hitchcock inside his own area but hitting the corner of the goalpost.
Moments later it was rather goalkeeping skill which kept the Bulls at bay - Hitchcock did well to use his body and block Grant Ryan's one-on-one effort from a tight angle.
In a rare chance for the hosts, Billy Logan came close to doubling the advantage but his low effort was blocked inside the area.
It only took half a minute for the first second-half chance to appear, as an early Bulls free-kick saw Annable's close-range header blocked.
The hosts were then quick to find their feet, however, and Lewis Dennison almost doubled the Seasiders' lead in style when he curled just wide from 25 yards.
Down the other end, Duggan was once again denied as his fierce volley on the edge of the Bridlington area was well saved by Hitchcock.
The Bulls had been unlucky not to score in the first half, and they were beginning to feel as if a goal would never come when Hitchcock and his defenders kept out a treble of close-range shots and somehow keep the Seasiders in front.
With ten minutes remaining another chance went begging, this time for Grant Ryan who headed Jordan Annable's inch-perfect cross over the bar.
As the game was set to head into injury time, the game could have been dead and buried when Logan headed a cross down perfectly for substitute Greening, who squandered his chance from just a few yards out.
It was another defeat on the road for the Bulls, who will look to get their first league win since August on Tuesday night when Yorkshire Amateur visit the Forest Town Arena.
MATCH DETAILS
Final score | Bridlington Town 1-0 AFC Mansfield
Scorers | McFayden (18')
Bridlington Town XI | Hitchcock (GK), Papprill, Lewis, Oliver, Jenkinson, Dennison, Walker (Greening 66'), Norfolk (C), Logan, McFayden (Adams 79'), Danby (Broadley 41')
Unused subs | Bulless, Taylor
Yellow cards | Logan (8'), Norfolk (46'), Walker (56'), Broadley (58')
Bulls XI | Warhurst (GK), Annable, Slone (Lucas 90'+3), Buxton (C), McGuire, Hough, Warner, McMillan (Webster 81'), Duggan, Ryan, Walker (Stacey 59')
Unused subs | Williams, Parkin (GK)
Yellow cards | Stacey (63')
Man of the Match | Jack Warner
Attendance | TBC