Abstract: An acetic acid-containing seasoning liquid includes acetic acid; at least one free amino acid selected from nine kinds of free amino acid groups consisting of valine, methionine, isoleucine, leucine, tyrosine, phenylalanine, histidine, lysine, and arginine; and a free amino acid other than the free amino acid groups. The acetic acid is contained in an amount of 0.1% by mass or more. A total content mass ratio of the nine kinds of free amino acid groups to total free amino acids is in a range of 0.20 to 0.70. A content mass ratio of the total free amino acids to the acetic acid is in a range of 0.01 to 0.30.