Use of a marker peptide for determining a risk of developing metabolic syndrome that is selected from the group consisting of following to and is for determining a risk of developing metabolic syndrome: a polypeptide comprising ten or more consecutive amino acid residues in the amino acid sequence of SEQ ID NO:1; a polypeptide comprising an amino acid sequence having one amino acid deletion, addition, substitution or insertion in ten or more consecutive amino acid residues in the amino acid sequence of SEQ ID NO:1 and capable of being used as a marker for determining the risk of developing the metabolic syndrome; a polypeptide comprising an amino acid sequence having 90% or more homology to ten or more consecutive amino acid residues in the amino acid sequence of SEQ ID NO:1 and capable of being used as the marker for determining the risk of developing the metabolic syndrome; a polypeptide comprising ten or more consecutive amino acid residues in an amino acid sequence having one amino acid deletion, addition, substitution or insertion in the amino acid sequence of SEQ ID NO:1 and capable of being used as the marker for determining the risk of developing the metabolic syndrome; a polypeptide comprising ten or more consecutive amino acid residues in an amino acid sequence having 90% or more homology to the amino acid sequence of SEQ ID NO:1 and capable of being used as the marker for determining the risk of developing the metabolic syndrome; a polypeptide comprising ten or more consecutive amino acid residues in the amino acid sequence of SEQ ID NO:2; a polypeptide comprising an amino acid sequence having one amino acid deletion, addition, substitution or insertion in ten or more consecutive amino acid residues in the amino acid sequence of SEQ ID NO:2 and capable of being used as the marker for determining the risk of developing the metabolic syndrome; a polypeptide comprising an amino acid sequence having 90% or more homology to ten or more consecutive amino acid residues in the amino acid sequence of SEQ ID NO:2; and capable of being used as the marker for determining the risk of developing the metabolic syndrome; a polypeptide comprising ten or more consecutive amino acid residues in an amino acid sequence having one amino acid deletion, addition, substitution or insertion in the amino acid sequence of SEQ ID NO:2 and capable of being used as the marker for determining the risk of developing the metabolic syndrome; and a polypeptide comprising ten or more consecutive amino acid residues in an amino acid sequence having 90% or more homology to the amino acid sequence of SEQ ID NO:2 and capable of being used as the marker for determining the risk of developing the metabolic syndrome. a polypeptide comprising ten or more consecutive amino acid residues in the amino acid sequence of SEQ ID NO:1; a polypeptide comprising an amino acid sequence having one amino acid deletion, addition, substitution or insertion in ten or more consecutive amino acid residues in the amino acid sequence of SEQ ID NO:1 and capable of being used as a marker for determining the risk of developing the metabolic syndrome; a polypeptide comprising an amino acid sequence having 90% or more homology to ten or more consecutive amino acid residues in the amino acid sequence of SEQ ID NO:1 and capable of being used as the marker for determining the risk of developing the metabolic syndrome; a polypeptide comprising ten or more consecutive amino acid residues in an amino acid sequence having one amino acid deletion, addition, substitution or insertion in the amino acid sequence of SEQ ID NO:1 and capable of being used as the marker for determining the risk of developing the metabolic syndrome; a polypeptide comprising ten or more consecutive amino acid residues in an amino acid sequence having 90% or more homology to the amino acid sequence of SEQ ID NO:1 and capable of being used as the marker for determining the risk of developing the metabolic syndrome; a polypeptide comprising ten or more consecutive amino acid residues in the amino acid sequence of SEQ ID NO:2; a polypeptide comprising an amino acid sequence having one amino acid deletion, addition, substitution or insertion in ten or more consecutive amino acid residues in the amino acid sequence of SEQ ID NO:2 and capable of being used as the marker for determining the risk of developing the metabolic syndrome; a polypeptide comprising an amino acid sequence having 90% or more homology to ten or more consecutive amino acid residues in the amino acid sequence of SEQ ID NO:2; and capable of being used as the marker for determining the risk of developing the metabolic syndrome; a polypeptide comprising ten or more consecutive amino acid residues in an amino acid sequence having one amino acid deletion, addition, substitution or insertion in the amino acid sequence of SEQ ID NO:2 and capable of being used as the marker for determining the risk of developing the metabolic syndrome; and a polypeptide comprising ten or more consecutive amino acid residues in an amino acid sequence having 90% or more homology to the amino acid sequence of SEQ ID NO:2 and capable of being used as the marker for determining the risk of developing the metabolic syndrome.