Misteryo sa Tuwa (English: Joyful Mystery) is a 1984 Philippine period drama and political thriller film written and directed by Abbo Q. Dela Cruz for the Experimental Cinema of the Philippines. Set in the town of Lucban, Quezon in 1950, three men Ponsoy (Tony Santos Sr.), Mesiong (Johnny Delgado), and Jamin (Ronnie Lazaro) discovered and retrieved a suitcase from a plane crash site and never reported it to the authorities and when the authorities approach Alcalde Valle, the town's mayor, to help find the suitcase, the latter made a vicious plan to steal the money for his greed. It also stars Amable Quiambao, Alicia Alonzo, Maria Montes, Vangie Labalan, Lito Anzures, and the extras in the film that tackles greed, corruption, and hatred.

Misteryo sa Tuwa was released by the Experimental Cinema of the Philippines on December 25, 1984.