The five-time world champion and Olympic bronze-medallist beat Shekerbekova 2-0 to improve on the bronze medal she won in the previous edition of the Games, where women boxers made their debut.
The Manipuri trailed her rival in the battle of two left-handed boxers in the first round with three ringside judges being swayed towards her rival's way at the Seonhak boxing gymnasium.
"I am very happy to win my first gold medal in these (multi-discipline) Games. I have won a bronze in the last Asian Games, a bronze in the Olympics and now the gold. I have sacrificed my family life, left my kids behind and worked very hard," Mary Kom said after the bout.
"I was always sure of the gold thanks to the support of my countrymen. After three kids I am an Asian Games champion. Thank you so much," said the beaming boxer at a media conference.
