PROBLEM TO BE SOLVED: To provide a liquid egg white excellent in foaming power by reducing the content of egg yolk mixed in the liquid egg white.SOLUTION: A manufacturing method of a liquid egg white with a reduced mixed amount of egg yolk includes: a bubble treatment step of processing a liquid egg white with a mixed amount of egg yolk of 0.01% or more and 1% or less with fine bubbles having an average bubble diameter of 50 &mum or less and a separation step of separating the bubbles floating on the liquid level from the liquid egg white with a reduced mixed amount of egg yolk.