Rama IV Bridge or Saphan Phra Ram Si, pronounced is a bridge over Chao Phraya River in the area of Pak Kret District, Nonthaburi Province, outskirts Bangkok.

Rama IV Bridge is a bridge across Chao Phraya River, connecting Bang Tanai and Pak Kret Subdistricts in Pak Kret District, northeastern Nonthaburi Province. It is not related to Rama IV Road in Bangkok in any way.