Pom Phlaeng Fai Fah is an old fortress, located at the tambon Talat of the amphur Phra Pradaeng, in Samut Prakan.

The fortification is situated at the mouth of the Chao Phraya River and in the past served as a military base to guard the advance by river to Bangkok from the Bay of Bangkok (fig.).

Today, the area of the fortress has been developed into a recreational area, and only some parts of the fortress are still in good condition.