Faithful main route
Brotherhood stays aligned with the manga and gives you the cleanest version of the intended full story.
Fullmetal Alchemist: Brotherhood or 2003 First?
Start with Brotherhood, then treat the 2003 anime as a separate later branch
This page answers the exact first-watch problem behind searches like “Brotherhood or Fullmetal Alchemist 2003 first.” The key is not runtime or filler. It is choosing one coherent route instead of blending two versions that stop matching after the shared opening material.
Brotherhood Episodes
64
Filler Problem
None
Optional Movie
After ep 20
Fast answer
Start with Brotherhood first. It follows the manga, lands the complete story in one route, and avoids the false idea that you need to sample the 2003 version first for setup. The 2003 anime is still worth watching if you are curious, but it is better treated as an alternate branch after Brotherhood, not as the default starting point.
Why Brotherhood is the better first-watch route
The first recommendation should optimize for coherence, completion, and low friction. Brotherhood wins on all three.
Complete ending
You are not left choosing between overlapping intros and different endings. One route, one payoff, no branch confusion.
Easier recommendation
It is the version most people mean when they recommend Fullmetal Alchemist now, so it matches present-day discussion and expectation.
What the 2003 anime actually is
The 2003 adaptation is not wrong. It is just a different branch, and that distinction is what first-time viewers need to keep straight.
Shared opening, separate destination
Both versions begin from the same premise and some of the same early material. After that, the 2003 anime moves into its own original storyline and does not serve as a required prologue to Brotherhood.
Better as a second route
If you finish Brotherhood and still want another interpretation, the 2003 anime becomes interesting on its own terms. That is a much cleaner viewing order than trying to decide episode-by-episode where to switch.
Do not splice the two
Hybrid watch orders create duplication at the start and incoherence later. Pick Brotherhood or 2003 for a given run, not a stitched combination of both.
Clean viewing order if you want both versions
This is the low-friction order that avoids branch confusion.
1
Watch Brotherhood first
Use Brotherhood as the main route. If you want the optional side story, Fullmetal Alchemist: The Sacred Star of Milos fits after episode 20.
2
Stop after the complete ending
Do not jump out early to compare versions. Finish the full Brotherhood route first so the core story lands cleanly.
3
Try the 2003 anime later if you want the alternate branch
Come back to 2003 afterward as a separate experience, not as something you needed in order to understand Brotherhood.
Need the main Brotherhood route?
Open the full guide for the episode route, movie placement, and runtime context.
Frequently Asked Questions
Should I watch Fullmetal Alchemist: Brotherhood Brotherhood or the 2003 anime first?
Start with Brotherhood first. It is the faithful manga adaptation, it finishes the story cleanly, and it is the version most people mean when they recommend Fullmetal Alchemist as a complete watch.
Is Fullmetal Alchemist: Brotherhood 2003 the same story as Brotherhood?
No. The two versions overlap at the start, then the 2003 anime branches into its own original storyline with a different ending. They are not interchangeable cuts of the same complete route.
Can I watch the 2003 anime after Brotherhood?
Yes. That is the cleanest way to do both. Watch Brotherhood first as the main route, then treat the 2003 anime as an alternate branch later if you want another take on the premise.
Do I need to mix episodes from Brotherhood and 2003?
No. Do not splice them together. Pick one route at a time. Mixing episodes creates redundancy early and breaks coherence once the 2003 version diverges from the manga.