To provide a peptide or the like that can suppress muscle atrophy.SOLUTION: The present invention provides a peptide composed of an amino acid sequence represented by one of (1) ValHisLeuLeu, (2) AlaAsnProLeu, (3) AsnLeu, (4) AlaMet, (5) LeuHisPheSer, (6) GlnGlnThrHis, (7) HisValProGlu, (8) AlaValLeuSer, (9) ArgAspValLeu, (10) ThrAspAsnLysValGlyMet, (11) ThrMetGlnLys, (12) HisValLeuAla, or (13) HisGlnGlyValMet, a composition containing the peptide as an active ingredient, and a muscle atrophy inhibitory composition containing the peptide as an active ingredient.SELECTED DRAWING: None【課題】筋萎縮を抑制できるペプチド等の提供。【解決手段】（１）ValHisLeuLeu、（２）AlaAsnProLeu、（３）AsnLeu、（４）AlaMet、（５）LeuHisPheSer、（６）GlnGlnThrHis、（７）HisValProGlu、（８）AlaValLeuSer、（９）ArgAspValLeu、（１０）ThrAspAsnLysValGlyMet、（１１）ThrMetGlnLys、（１２）HisValLeuAla、又は（１３）HisGlnGlyValMetのいずれかで表されるアミノ酸配列からなるペプチド、上記ペプチドを有効成分とする組成物、及び上記ペプチドを有効成分とする筋萎縮抑制用組成物の提供。【選択図】なし
