The Ambarawa Railway Museum, (Indonesian: Museum Kereta Api Ambarawa) is a museum located in Ambarawa in Central Java, Indonesia. The museum focuses on the collection of steam locomotives, the remains of the closing of the 3 ft 6 in (1,067 mm) railway line. Ambarawa was a military city during the Dutch Colonial Government. King Willem I ordered the construction of a new railway station to enable the government to transport its troops to Semarang.
On May 21, 1873 the Ambarawa railway station was built on a 127,500 m² land. This was known back then as Willem I Station.The Willem I Railway Station was originally a transhipment point between the 4 ft 8 1⁄2 in (1,435 mm) gauge branch from Kedungjati to the northeast and the 3 ft 6 in (1,067 mm) gauge line onward towards Yogyakarta via Magelang to the south. It is still possible to see that the two sides of the station were built to accommodate different size trains.
The museum collected 21 steam locomotives. Currently four locomotives are operational. Other collections of the museum include old telephones, Morse telegraph equipment, old bells and signals equipment, and some antique furniture. Some of the steam locomotives are the 2 B25 class 0-4-2RT B2502 and B2503 which is from the original fleet of 5 supplied to the line about 100 years ago (a third locomotive, B 2501, is preserved in a park in the town nearby).
The E10 class 0-10-0RT E1060 which was originally delivered to West Sumatra in the 1960s for working the coal railway, but was brought to Java, later returned again to Sawahlunto, and a conventional locomotive 2-6-0T C1218 which was restored to working order in 2006, but transferred to Solo to working as tourist train, named Sepur Kluthuk Jaladara. The museum also have a small diesel shunter D300 class 0-8-0D D300 23, previously based at Cepu, an old UH-295 crane from Semarang, and the newly restored B51 class 4-4-0 B5112 specially for Ambarawa-Tuntang line.