Professional ratings
Aggregate scores
Source	Rating
Metacritic	(70/100)
Review scores
Source	Rating
Allmusic
The A.V. Club	(unfavorable)
Entertainment Weekly	B
Paste
Pitchfork Media	(7.4/10)
PopMatters	(9/10)
Q
Rolling Stone
Uncut
The Village Voice	(favorable)

The Forgotten Arm is an album by singer-songwriter Aimee Mann with illustrations by artist Owen Smith. It was released by SuperEgo Records on May 3, 2005. It is a concept album, telling the story of two characters who run off with each other to escape their problems, but end up in more trouble than either of them could have imagined. The album reflects Mann's own boxing in its story and illustrations. The title is derived from a move in which one arm is used to hit the opponent, causing him to "forget" about the other arm, which is then used to deliver a harsher blow.

The album won the 2006 Grammy Award for Best Recording Package for Mann and Gail Marowitz (art directors).

The album so far has a score of 70 out of 100 from Metacritic based on "generally favorable reviews".Prefix Magazine gave the album a score of seven out of ten and said it has "Enough bending guitar licks to satisfy the yuppiest of thirtysomething businessmen and enough mellow ballads to satisfy your Dixie Chicks-loving mom."Trouser Press gave it a positive review and said, "Some of the songs are immediately engrossing... Others mostly carry the story forward while allowing Mann to indulge her career-long taste for vintage keyboard orchestration, coolly elegant pop arrangements and displays of tart wordplay."E! Online gave it a B− and said it "reveals how straight-up dull Mann's country-tinged songs can be." Other reviews are very average, mixed or negative: Mojo gave it three stars out of five and called it "an unfussy affair".Blender gave it two stars out of five and said of Mann, "If she doesn't follow commercial formulas, she's following creative ones, and selling herself short in the process."The A.V. Club gave it an unfavorable review and said, "Mann's signature wordplay sounds clichéd and exhausted, and her melodies lack the energy and pop sparkle that distinguished her pre-Lost In Space work."

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