The Kanchanaphisek Bridge (Thai: สะพานกาญจนาภิเษก) is a cable stayed bridge crossing the Chao Phraya river in Samut Prakan Province, Thailand. It is part of the Outer Ring Road encircling Bangkok. The bridge was opened to traffic on November 15, 2007, and has a main span of 500 metres.

The bridge was designed by Parsons Brinckerhoff. The bridge is part of the Outer Ring Road network, thus there is a toll for its use.