Sri Guru Har Krishan Sahib Ji (Gurmukhi: ਗੁਰੂ ਹਰਿ ਕ੍ਰਿਸ਼ਨ ਸਾਹਿਬ ਜੀ) (Wednesday, 23 July 1656 – Saturday, 16 April 1664) was the eighth Guru Nanak Dev ji (divine messengers) of Sikhism. He was the second son of the seventh Guru, Sri Guru Har Rai Sahib Ji and Mata Krishan Kaur Ji (Sulakhni Ji). Before passing away in 1661, Guru Har Rai Sahib Ji had declared that his younger son Har Krishan, would be the next Sikh Guru. Thus, Har Krishan Sahib ascended to the throne of Guruship on Sunday, 20 October 1661, at the young age of five years.

In human history, there are but few devotees of God who have achieved a supreme level of spirituality in such a tender age, as Guru Har Krishan Sahib did. Despite his young age, Guru Sahib used to delight the hearts of his disciples by his commentaries on the passages from the holy scripture, the Guru Granth Sahib. He reminded people to cherish the One God alone, asking them to discard passions and learn the virtues of patience, charity and love.