Obi-Wan Kenobi

First Lightsaber
Obi-Wan's first lightsaber was built sometime before the Trade Federation blockade of Naboo when he was a padawan learner as part of his Jedi training. It was lost during a fateful duel that took the life of his Master, Qui-Gon Jinn.

Appearances
Star Wars Episode I: The Phantom Menace

Inherited
After using it to slay Darth Maul on Naboo, Obi-Wan inherited his fallen master's lightsaber. What happened to it afterward is unknown, though it can be assumed he kept it.

Appearances
Star Wars Episode I: The Phantom Menace

Second Lightsaber
Obi-Wan's second lightsaber was constructed sometime after the Battle of Naboo. It's design is almost identical to his first, with a few minor differences. It was taken from him when he was captured by Count Dooku, just prior to the Battle of Geonosis.

Appearance
Star Wars Episode II: Attack of the Clones

Something Borrowed
When his Jedi compatriots came to his rescue during the Battle of Geonosis, Obi-Wan was given a lightsaber to fight with.

Appearances
Star Wars Episode II: Attack of the Clones

Third Lightsaber
Obi-Wan built his third lightsaber following the opening battle of the Clone Wars and would remain by his side until his death aboard the Death Star just prior to the Battle of Yavin. What happened to it after that is unknown.

Appearances
Star Wars Episode III: Revenge of the Sith

Star Wars Episode IV: A New Hope