Ajab Gayer Ajab Katha () is a 1998 Bengali comedy film directed by Tapan Sinha. Based on a novel Nabiganjer Daityo by Shirshendu Mukhopadhyay, the plot follows a group of villagers who attempt to save their king Birchandra from an invasion launched a group of scumbags. It stars Soumitra Chatterjee, Debashree Roy, Debesh Roychowdhury, Nirmal Kumar, Manoj Mitra, Kaushik Sen and Rajatava Dutta. It was the last complete movie made by Sinha.
Birchandra, the king without a kingdom lives alone in his palace at Nabiganj village. He is least bothered about his kinghood and hidden royal treasure. Few villagers take undue advantage of his indifference. One unknown bodybuilder Kinkar comes to the village and loses his memory. Birchandra gives him shelter. Local teacher Dukkhoharan and an old priest of the village realises that some criminals may attack Birchandra for the king's treasure that is hidden below his palace.