Radhey Shyam Sharma (65), who was disturbed after his wife's death a couple of years ago, immolated himself at his rented house in Govind Colony area here, they said.
After his son went for work in the morning, Sharma, who earlier worked at a furniture shop in the city, sent his daughter-in-law also out of the house on some pretext and then ended his life.
Some clothes and other household goods were also gutted in the blaze, police said, adding that the body was sent for postmortem.