Jam Gadang (literally "Big Clock") is a clocktower and major landmark of the city of Bukittinggi, West Sumatra, Indonesia. It is located in the centre of the city, near the main market, Pasar Atas, and is a tourist attraction. This clocktower has large clocks on each side and was given the name "Jam Gadang" (English: big clock).

The structure was built in 1926 during the Dutch colonial era, as a gift from the Queen to city's controleur. It was designed by architects Yazin and Sutan Gigi Ameh. Originally a rooster figure was placed on the apex, but it was changed into a Jinja-like ornament during the Japanese occupation. Following Indonesian independence, it was reshaped to its present form resembling traditional Minangkabaun roofs (see Rumah gadang). It is said to have cost 3,000 guilder.