The theft of the defibrillator took place some time between 7th and 9th February from its site on Platform 2 of the station.
Witnesses or anyone who has any information concerning the theft are urged to contact the British Transport Police.
The public access defibrillator has played a crucial part in keeping people safe and some months ago was used to help save the life of a man who had collapsed a short distance from the station.
Bridgend is Wales’ fifth busiest station and in 2016/17 it saw more than 1.5 million people passing through it.
Sgt Stephen Dawkins of the BTP said: “This was a mindless theft of emergency lifesaving equipment which could be crucial to saving lives.
“The fact it did save a life not so long ago it testament to just what an important part it plays not just on the station but in the community too.
“If you do know anything at all about this theft please contact the BTP on 0800 40 50 40.”
Thomas Owens, who manages Bridgend Station for Arriva Trains Wales added: “The defibrillator is key to saving lives. We know that if you suffer a heart attack, getting medical attention quickly is crucial, so we were all bitterly disappointed at this theft and would call on anyone who might know something to contact the BTP.”
Crime No. 1800010511
CW No. 326 12/02/18