We　consider　the　estimation　of　a　semiparametric　additive　isotonic　regression　model　with　error-prone　covariates.　We　show　the　limiting　distributions　of　the　proposed　estimators　of　the　parametric　component　as　well　as　the　functional　component.　A　simulation　study　is　carried　out　to　investigate　the　performance　of　the　proposed　estimators.　(C)　2012　Elsevier　B.V.　All　rights　reserved.