Provided is a cyclic peptide having excellent antibody binding properties and improved chemical resistance. The cyclic peptide is represented by formula (I) below. (I) RN-Xg-[Xi-Xa-Xm-X1-X2-X3-Xn-Xb-Xj]k-Xh-RC. In formula (I), RN represents an N-terminal group； RC represents a C-terminal group； X1 represents an L-leucine residue, L-isoleucine residue, L-methionine residue, L-lysine residue, or L-arginine residue； X2 represents an L-valine residue or L-isoleucine residue； X3 represents an L-tryptophan residue or L-phenylalanine residue； one among Xa and Xb represents an amino acid residue derived from an amino acid having an azide group in a side chain, the other represents an amino acid residue derived from an amino acid having an alkynyl group in a side chain, and Xa and Xb are bonded via a triazole bond； Xg, Xh, Xi, Xj, Xm, and Xn respectively represent contiguous g X's, contiguous h X's, contiguous i X's, contiguous j X's, contiguous m X's, and contiguous n X's； X represents an amino acid residue, and when there are a plurality of X's, the plurality of X's may be the same or different； g, h, i, and j are each independently an integer of 0 or greater； m and n are integers satisfying 0=m=9, 0=n=9, and 3=m+n=9； and k is an integer of 1 or greater, and when k=2, each of X1, X2, X3, Xa, Xb, Xi, Xj, Xm, and Xn may be the same or different for each of the repeating units [Xi-Xa-Xm-X1-X2-X3-Xn-Xb-Xj].
