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Consent of Independent Registered Public Accounting Firm
We consent to the reference to our firm under the caption "Experts" and to the use of our report dated July 3, 2013, except for Note 16, as to which the date is September 5, 2013, in Amendment No. 2 to the Registration Statement (Form S-1 No. 333-190417) and related Prospectus of Acceleron Pharma Inc. for the registration of 5,347,500 shares of its common stock.
/s/ Ernst & Young LLP
Boston, Massachusetts
September 5, 2013
Consent of Independent Registered Public Accounting Firm