Substitute Leandro Trossard scored his first goal for Arsenal but the Premier League leaders missed the chance to move eight points clear at the top as Ivan Toney earned resilient Brentford a deserved point.
After a goalless first half in which the Bees hit the woodwork through Toney, the Gunners took the lead when Trossard struck at the back post four minutes after coming off the bench.
But Brentford got the reward their excellent away performance deserved when Toney nodded in Christian Norgaard's cross from close range.
There was a lengthy check by the video assistant referee for a possible offside in the build-up but the goal was eventually confirmed.
Arsenal raised the tempo in the closing stages - including seven minutes of added time - as they searched for a winner but Brentford completed an excellent all-round defensive display by holding firm for a point.
Arsenal face Manchester City - six points behind before their game against Aston Villa - in a top-of-the table showdown on 15 February.
If Pep Guardiola's side win on Sunday afternoon, they would reduce the deficit to three by the time the top two meet.
Brentford, meanwhile, are eighth and just five points off fifth.
Match Events
6' What a save from Ramsdale!
11' OFFSIDE!
25' OFF THE POST!
55' CLOSE! Tony’s shot wide out
66' GOAL! Arsenal 1-0 Brentford (Trossard)
74' GOAL! Arsenal 1-1 Brentford (Ivan Toney)
Line-ups
Arsenal XI: Xhaka, Partey, Zinchenko, Martin Ødegaard, Gabriel, Ramsdale, Ben White, Nketiah, Martinelli, William Saliba, Saka
Subs: Trossard, Jorginho, Tierney, Holding, Matt Turner, Tomiyasu, Jakub Kiwior, Fábio Vieira, Amario Cozier-Duberry
Brentford XI: Mee, Christian Nörgaard, Ivan Toney, David Raya, Kristoffer Ajer, Rico Henry, Mathias Jensen, Janelt, Ethan Pinnock, Mads Roerslev, Bryan Mbeumo
Subs: Jorgensen, Yoane Wissa, J. Dasilva, Shandon Baptiste, Mikkel Damsgaard, Aaron Hickey, Keane Lewis-Potter, Kevin Schade, Matthew Cox
Doxmang
597
Since we buy Chelsea bad luck Jorginho Two games one loss one draw 🤔🙄 🥺 we that always win win win win 😭😭😭😭.
Soð
582
I said it before & Im saying it again, distance yourself from any person who think Arsenal will win EPL
siamanenga
483
EPL has 2 rules:::1 never allow man city to be on top of table 🙄🙄rule 2 remember rule number one 🤣🤣🤣
Rj13
479
Me : i think Jorghino is the caus...... Potter : shhhhhh [Crylaugh]
Alexchope
420
The boss is just watching
sikaputafernando
407
Everyone is dropping points. Manchester united this the only chance for you to get what is yours 🏆🎖️😂😂
KeshabBhandari
394
Respect 🫡❤️❤️ What a gesture from Berntford players
ClydeRice
313
Stubborn Arsenal denies Brentford 3 points
starryblues
312
Chelsea fans rushing to thank Brentford for preventing them from noise pollution be like
HannaRahi
294
How arsenal Is still Standing on top of the table 😂
Champion88
273
Meanwhile Monaco are killing PSG [Crylaugh][Crylaugh]
demizx2
263
where are u 😂😂😂
CITYZENS24/7
248
Us city fans at the match end. Thanks alot Brentford u guys kept our hopes alive.
Ineznik
210
we can not accept this 🤣🤣
Kingval60
152
Man city fans right now
ÃsøphMorgan
130
Slowly slowly it's coming down to difficult settings
Qerro
85
Back to default settings The Arsenal we all Love And Cherish is Back If you love Vawulence let's react here 💀😁