[Object] To provide a zinc-based plated steel sheet excellent in coating adhesiveness after hot pressing more conveniently. [Solution] A zinc-based plated steel sheet according to the present invention includes: a zinc-based plated steel sheet that is a base metal; and a surface treatment layer formed on at least one surface of the zinc-based plated steel sheet and containing one or more magnesium compounds. The amount of the one or more magnesium compounds contained is not less than 0.2 g/m 2 and not more than 5.0 g/m 2 per one surface on a magnesium oxide basis.