- Directors: Rajkumar Hirani
- Producers: Vidhu Vinod Chopra
- Writers: Vidhu Vinod Chopra, Rajkumar Hirani, Lajan Joseph, Abbas Tyrewala
- Genres: Comedy, Crime
- Actors: Sanjay Dutt, Arshad Warsi, Jimmy Shergill, Sunil Dutt, Gracy Singh, Boman Irani
Murli Prasad Sharma, nicknamed “Munna Bhai” (literally “Brother Munna”) is a bhai or Gunda; a crime don in the Mumbai underworld. Given that his father had wished him to be a medical doctor, he creates the faux Sri Hari Prasad Sharma Charitable Hospital (named after his father) and pretends to live in accordance with this wish whenever his father (Sunil Dutt) and mother (Rohini Hattangadi) visit him in Mumbai.
One year, however, Munna’s plan goes awry when his father meets an old acquaintance, Dr. Asthana (Boman Irani) and the two older men decide to marry Munna to Dr. Asthana’s daughter, Dr. “Chinki” Suman (Gracy Singh). It is at this point that the truth about Munna is revealed. Dr. Asthana insults Munna’s parents and calls them “fools” for being ignorant of Munna’s real life. Munna’s father and mother, aghast and later heartbroken, leave for their village.
Munna, in grief and despair, decides that the only way to redeem himself and to gain revenge for the humiliation suffered by his father at the hands of the spiteful Dr. Ashthana is to become a doctor in fact. He therefore decides to go to a Medical College in order to obtain an M.B.B.S. degree; the graduate medical degree in India, an acronym of “Bachelor of Medicine and Bachelor of Surgery”.
Dr. Asthana eventually realizes his folly. Munna later marries Dr. Suman, learning for the first time that she is “Chinki”. Subsequently the Medical College â€“ under Rustam Pavri’s management since the retirement of Dr. Asthana â€“ begins to imitate Munna’s radical methods of treatment. Munna and Dr. Suman open a hospital in Munna’s home village, where they implement Munna’s ideas daily. This, in addition to the birth of their offspring, earns Munna the nickname “Munnabhai â€“ M.B.B.S. – Miya Biwi Bachhon Samet” (literally “Husband Wife with Children”). Munna’s parents reconcile with him. His sidekick Circuit marries and has a son, who is nicknamed “Short Circuit” as a pun both on his father’s alias and on the process by which an electrical device fails. As the film concluded, we see Anand, restored to normal mental health, narrating the story to children.