This gurdwara is associated with the Tenth Guru, Guru Gobind Singh Ji. During his stay at Muktsar, Guru Sahib was brushing his teeth one morning. A Mughal soldier, sent to kill Guru Sahib, attacked him from behind. Guru Sahib reacted swiftly and hit the soldier on the head with the utensil that he had with him. The Mughal soldier was killed on the spot. A small Manji Sahib was constructed at this place and named Datan Sar (datan means toothbrush). Later on, a gurdwara was constructed here. The grave of the Mughal soldier is also present near the gurdwara. The birthdays of Guru Nanak Dev Ji, Guru Gobind Singh Ji and Shahidi purab of Guru Arjun Dev Ji are celebrated with great fervour here. Besides, the Magh Mela is organized on the 12th and 13th of January to commemorate the sacrifice of the Forty Muktas. Diwali and Baisakhi are also celebrated
Gurudwara Sri Datansar Sahib is situated in the Mukatsar city. From Tibbi Sahib once Sri Guru Gobind Singh ji arrived here for brushing his teeth, (with twig,) in morning. A mughal soldier who was in the attire of sikh, attacked Guru Sahib from behind. Guru Sahib reacted swiftly and hit the utensil (that he had with him) on the head of the soldier. The mughal soldier was killed on the spot. The grave of the mughal soldier is also present on the east side of Gurudwara Sahib. The pilgrims hits his grave 5 times with his shoes on the directions of Guru Sahib.
Gurdwara Sri Datan Sar Sahib is located on the outskirts of Muktsar city near Gurdwara Tibbi Sahib on the Guru Harsahai-Muktsar bypass. It is three kilometers from Gurdwara Tuti Gandi Sahib, Muktsar.