Episode 439: Luffy's Treatment Begins - Iva's Miraculous Power!!
One Piece Episode 439 „Luffy's Treatment Begins - Iva's Miraculous Power!!“. Adapts chapters 537–538. First aired: 2010-02-21.
- Read on in the manga from: Chapter 539 (Volume 55 – Okama in Hell)
- Title (Japanese): ルフィ治療開始 イワさん奇跡の能力！！
- Title (romaji): Rufi Chiryō Kaishi Iwa-san Kiseki no Chikara!!
- First aired (Japanese): 2010-02-21
- First aired (German): 2014-11-20
- Category: Story
- Arc: Impel Down Arc
- Chapters adapted: Chapters 537, pages 10-17; Chapters 538, pages 1-7