Mera Naam Joker is the story of Raju, whose father was a considered the best circus clown ever. Ever since Raju's father died in a trapeze accident during his performance, Raju's mother had always been repulsed by the circus. As luck would have it, Raju had a natural affinity towards the circus world. The film traces Raju's journey from his childhood to the day of his last performance.
Mera Naam Joker is divided into 3 chapters. The first chapter is about the adolescent Raju where he is infatuated with his teacher Mary (Simi Garewal). Here is where Raju comes to the realisation that he was born to make the world laugh, even through his own troubles.
After his first heartbreak, story moves on to the adult Raju who is working with Gemini Circus as a clown. The circus is owned by Mahendra Singh (Dharmendra). Here he meets Marina (Kseniya Ryabinkina), a Russian trapeze artist and despite the language barrier he manages to fall in love with her, and dreams of a married life with her. But Raju faces heartbreak once again when the circus ends and Marina returns to Russia. It is in this chapter that Raju's mother dies just before Raju's performance, and he has to go up on stage regardless.
In the final chapter, Raju meets Meena (Padmini), a woman who has ambitions of becoming a famous actress. By this point, Raju is a derelict and earns some money through manual labour. Meena befriends him and manages to win his heart only to dump him in the end due to her lust for success.