Youth Pledge Museum, Historical museum in Central Jakarta, Indonesia

The Youth Pledge Museum is a history museum in Central Jakarta, Indonesia, documenting the rise of the Indonesian national movement during colonial times. The collection includes photographs, original documents, and personal belongings of young activists presented across several rooms on different floors.

A congress of young activists from across the Dutch East Indies archipelago met here in October 1928 and led to a declaration of shared goals for an independent Indonesia. The government converted the building into a public museum more than four decades later to commemorate that event.

Residents called the building Langen Siswo, and from 1927 they put up a sign naming it Indonesische Clubgebouw, the meeting place of national youth. The house had a caretaker known as Bang Salim, and the magazine Indonesia Raya was produced here under the PPPI. The violin of Wage Rudolf Supratman, who wrote the anthem, is among the 2,867 items recorded in 2007.

The museum is closed on Mondays and national holidays. Opening hours differ between the Indonesian and English sources: the Indonesian article gives Tuesday to Friday 08:00–16:00 and weekends 08:00–16:00, while the English article gives Tuesday to Friday 08:00–15:00 and weekends 08:00–14:00. The building is on Jalan Kramat Raya in Central Jakarta, and the main building has a front porch, a living room, five rooms and a meeting room.

The building was rented in 1937 by Loh Jing Tjoe, who ran a flower shop there until 1948; from 1951 to 1970 the Customs and Excise Inspectorate used it as offices. Earlier, from 1934, youth activities moved to Jalan Kramat 156 when the Kramat 106 occupants stopped paying rent.