All most all Gurudwaras in Punjab houses a pool around the holy shrine to take a bath. Santhoshkar Sahib is such a pool, which adjoins the Harminder Sahib. These pools are popularly called as sarovar.

This sacred pool is constructed by Guru Ramdas, as per the directives of guru Amar Das. While searching for the perfect site to dig the Sarovar, Guru Ram Das come across with a sage by name Santakha.

It is believed that Santokhsar Sahib situates at the same place where the sage was found meditating. Though the construction of the tank was begun in the tenure of Guru Ram Das, it was completed by Guru Arjan. Baba Buddha was chosen to manage the work, and during 1587-89 the digging of the pool was completed.