PROBLEM TO BE SOLVED: To provide a highly palatable liquid seasoning having rich flavor (aroma) of kelp soup stock, rich flavor (aroma) of chicken soup stock, and suppressed smell of animal raw material, excellent in flavor balance, when cooked or eaten; and a manufacturing method thereof.SOLUTION: The liquid seasoning is produced from a raw material including a kelp extract, a chicken extract, and collagen peptide. The mass ratio between mannitol and collagen peptide contained in the kelp extract is 1:3 to 1:100. The mass ratio between nitrogen content and collagen peptide contained in the chicken extract is 1:5 to 1:200.