The Krungthep Bridge (Thai: สะพานกรุงเทพ, RTGS: Saphan Krung Thep, pronounced [sā.pʰāːn krūŋ tʰêːp]) is a bascule bridge (drawbridge) spanning the Chao Phraya river in Bangkok, Thailand. It was the third bridge to be built across the Chao Phraya river. It was constructed by Fuji Car Manufacturing Co., Ltd, with a budget of 31,912,500 baht.

Krungthep Bridge สะพานกรุงเทพ
Krungthep Bridge in 2017, shown here opening for mine countermeasures support ship HTMS Thalang
Coordinates	13°42′04″N 100°29′30″E / 13.70107°N 100.49166°E / 13.70107; 100.49166
Carries	Four lanes of roadway, pedestrians
Crosses	Chao Phraya River
Locale	Bangkok, Thailand
Characteristics
Design	Bascule bridge, Truss bridge
Total length	626.25 m
Longest span	64 m
Clearance above	7.5 m
History
Construction start	31 August 1954
Construction end	24 March 1959
Opened	25 June 1959
Location

Heavy congestion on the bridge led to the construction of the 6-lane Rama III Bridge nearby.