Born on 1 March 1968 at Kairang Mayai Leikai in Imphal in Manipur, Kunjarani Devi started taking interest in sports while still in Imphal's Sindam Sinshang Resident High school in 1978. And by the time she finished her graduation from the Maharaja Bodha Chandra College in Imphal, weightlifting had become her first choice. She joined the Central Reserve Police Force she went on to make waves in the Police Championships and captained the Indian Police team from 1996 to 1998.
Her first World Women's Weightlifting Championship was the Manchester edition in 1989 and the reward of three Silver Medals buoyed her spirits considerably. Since then she has taken part in seven successive World Championships and with the exception of the Melbourne edition in 1993, she has won medals at every one of those competitions. However, she however could not get to the top spot, having always to be content with Silver Medals.
A Bronze Medal was the most she managed in the Asian Games at Beijing in 1990 and Hiroshima in 1994 but failed to secure any medal in the 1998 edition of the Asian Games at Bangkok
Kunjarani has had better luck in the Asian Weightlifting Championships to which she has been a regular visitor. Starting with one Silver and two Bronze Medals in the 1989 edition in Shanghai, she progressed to three Silver Medals in the 44-kilogram class in the 1991 edition in Indonesia. She retained her second spot in the next one in Thailand in 1992 and China in 1993. Her best performance came in the 1995 competition in South Korea where she won two Gold and one Bronze in the 46-kilogram category. But again went down in 1996 to settle for two Silver and one Bronze in the championship held in Japan.
Kunjarani Devi has served a six-month suspension after testing positive to anabolic steroids during 2001.
Kunjarani claimed the gold medal at the 2006 She is a recipient of Arjuna award in 1990 and shared the Rajiv Gandhi Khel Ratna award with Leander Paes for the year 1996-1997. In the same year she also won the K.K.Birla Sports award.
She has more than fifty international medals to her credit. She also won a gold medal at the 2006 Commonwealth Games held in Melbourne for 48 kg womans weightlifting with a Games record with an overall lift of 166 kg which included 72 kg in snatch and 94 kg in the clean and jerk.