Provided is a surface treatment liquid for obtaining a galvanized steel sheet with a surface treatment film: that does not contain any chromium compounds in the surface treatment film, and, needless to say, has excellent corrosion resistance in flat portions, blackening resistance and water staining resistance; and has excellent resistance to darkening, resistance to flake-like peeling, and resistance to corrosion even after being subjected to severe ironing such as continuous high speed press forming. This surface treatment liquid for a galvanized steel sheet: is characterized by containing a zirconium carbonate compound (A), a phosphate compound (B), hydroxy carboxylic acid (C), tetra-alkoxysilane (D), a silane coupling agent (E) having an epoxy group, a vanadate compound (F), and a nickel compound (G); and is further characterized in that the contents of (A) to (G) are adjusted so as to satisfy specific conditions.
