The "Somdet Phra Pinklao Bridge" or commonly known as the "Phra Pinklao Bridge" or "Pinklao Bridge" is a concrete girder bridge spanning the Chao Phraya River, connecting Samsen Road in the Phra Nakhon district (on the Bangkok side) with Somdet Phra Pinklao Road in the Bang Kok Noi district (on the Thonburi side) of Bangkok. It is currently under the responsibility of the Department of Rural Roads.

The Phra Pinklao Bridge is a continuous prestressed concrete bridge with six traffic lanes. It has a width of 26.60 meters and a length of 622 meters. The construction aimed to alleviate traffic congestion and was a collaborative effort with financial assistance from the Japanese government. The Japanese government supported the bridge's design survey and provided financial aid in the form of a loan, complementing the Thai government's budget. Construction began on August 4, 1971, and the bridge was completed, with traffic opening on September 24, 1973. It was named "Somdet Phra Pinklao Bridge" in honor of His Royal Highness Prince Pinklao, the younger brother of King Rama IV, and to pay tribute to King Rama IX in the era of King Bhumibol Adulyadej. The construction site on the Bangkok side was once part of the area of the Bang Khun Phrom Palace.