Batman: The Movie is the very first Batman film (if you don't count the movie serial). It came out in 1966.

The Plot

Batman and Robin, the Dynamic Duo, find out their four arch-enemies, Catwoman, the Joker, Penguin, and Riddler, have teamed up. The villains are holding Commodore Schmidlapp captive, although the Commodore is unaware of this. The villains went to use a disguised Catwoman, to seduce Bruce Wayne, so they can kidnap him. Also, the villains are planning on getting rid of the leaders of the United Nations, so they can be the new leaders of the world.

From the plot summary I gave,...